Discount Gambling

Chase The Flush Easy Advanced Strategy

Posted in chase the flush by stephenhow on March 8, 2023

AGS’s Hold’Em-style flush game has recently arrived at my local Viejas Casino, and now it’s all I play anymore. It’s fun and relaxing to just play symbols and colors, and there’s a lot more different outcomes than in simple Ultimate Texas Hold’Em. Structurally, it’s similar, where the player paces equal Ante and X-Tra wagers (similar to UTH’s Ante = Blind) before the hand begins. The players and dealer then each receive three hole cards, which is more interesting than UTH’s two hole cards, because of the increased ways to make a hand.

I did the analysis for AGS back in 2017 when they developed the game, and I’ve previously posted all the details about the house edge and the original bonus. I included a basic strategy for the game in that original post, but now that I’ve played it at length, I think I can present a much more concise description of a nearly optimal strategy.

To summarize the rules, the player posts an equal Ante and X-Tra bonus bet before the hand begins. Each player and the dealer each receive three hole cards. There are four community cards, exposed via a 2-card flop, then a 2-card turn/river. The player may go all-in with a 3x Play bet pre-flop, or with a 2x bet after the flop, or with a 1x bet after the turn/river. Otherwise the player folds and loses his Ante and X-Tra bets. The dealer qualifies with a 3-card Nine-high or better hand, otherwise the Ante pushes. The Play bet always receives even-money action, and the X-Tra bonus pays odds when the player beats the dealer with a 4-card flush or better. The only hand for the main game are flushes (i.e., not straight flushes, or any other rank) rated by the number of cards of the same suit in a hand, followed by their descending card ranks.

Fortunately, the near-optimal strategy works out to be very straight-forward, and plays fairly automatically. You know what to look for in advance of each step, and how to react to what cards hit the board. Basically, you preflop raise (3x) strong starting hands, generally 2x/1x bet a 3-card flush (except for a few exceptions), and occasionally 1x call a two-card flush against a rainbow board. The exceptions are few and very specific, and will make sense to you as soon as you encounter them.

You can practice this game online on AGS’ website.

Improved and Intuitive Strategy

Preflop, you should 3x the following strong hands:

Bet 3x:
    any three suited cards
    any suited Ace
    suited King with sufficiently high offsuit kicker:
        KQs.3+, KJs.4+, KTs.5+, K9s.5+, K8s.6+, K7s.7+,
        K6s.7+, K5s.7+, K4s.7+, K3s.8+, K2s.8+
    suited Queens w/ high kickers:
        QJs.J+, QTs.J+, Q9s.J+, QXs.Q+
    suited Jack with King+ offsuit kicker
    suited Ten with Ace offsuit kicker
    three high rainbow cards:
        AA.4+, KK.J+, AK.7+, AQ.T+
Else check

Then, after the flop:

Bet 4+ card flush:
    always
Bet 3-card flush:
    flop:
        offsuit board:
            when have both suits of board
            when 3-card flush > other board suit
            with 9-6-x flush or better
        suited board:
            with flush hole card SIX or higher
    river:
        rainbow board:
            always
        2-suited + 2-suited board:
            when < 15 single dealer cards beat you
        2-suited + 2-offsuit board:
            any card of majority board suit
            any 3-card flush > 2-suited board cards
            any 3-card flush when 2-suited board cards < NINE
            any qualifier > board suits not part of your flush
        3-suited + 1-offsuit board:
            play any 3-card flush > board
            play board if offsuit board card is <= 3-card flush
Bet 2-card flush:
    flop:
        offsuit board:
            when have both board suits, and these two 2-card flushes make:
                nut 2-card flush
                2nd-nut 2-card flush & 8th nut 2-card flush or better
                3rd-nut 2-card flush & 5th nut 2-card flush or better
    river:
        when rainbow board and < 10 single dealer cards that beat you

Else check/fold

Why It’s Fun

You may have noticed that UTH has become very crowded these days, and everyone knows the game well enough to take all the fun out of it. The games are usually expensive, with minimums at $10-$15-$25 Antes, because of its popularity. And I don’t have to tell you how bad that game can run, especially when the boards miss your 4x raising hands.

Chase The Flush is kind a return to the days when Ultimate was new, and nobody knew how to play. It’s kind of fun to see people learning a new game, trying out new strategies. UTH has become a bit boring, and less communal. People selfishly call out for their specific card(s) to hit the board, which would probably hurt you. In Chase The Flush, multiple people make various hands out of all kinds of boards. This is probably due to the fact that players hold three hole cards instead of two.

Also interesting is that the 7-card flush (pays 250:1 on both the X-Tra and the Same Suit Bonus) and the 6-card flush (pays 20:1 on the X-Tra, and 50:1 on the Same Suit Bonus) hit much more frequently than their Royal and Straight Flush counterparts on UTH. It’s perceptible. Also the Same Suit Bonus hits about 25% of the time, but at my local casino (Viejas), they’ve lowered the payouts a bit, and the house edge is substantially higher than the typical UTH Trips side bet.

At my local casino, they always seem to have a $5 minimum table, and sometimes it’s not very full, and you can enjoy having some more personal space than at a packed UTH table. Also, because of the 3x (instead of 4x) preflop raise, the game tends to feel like it’s less volatile (until you hit a nice 6-card flush or better, which generally happens every session).

How to Play Quickly

Once you’ve played a bit and understand the strategy, you’ll probably come up with some kind of similar ways of remembering your hand so you don’t have to constantly look at them to decide what to do. Normally, when I 3x raise, I just tuck the cards and forget what I have, and wait for showdown. Otherwise, if I have “rainbow” cards, I just remember the one suit I don’t have. Then, I’ll know if I flop a 3-card flush, or flop two 2-card flushes. If one of the suits I don’t have hits the flop, then chances are I’ll fold if any more hit the turn or river.

If my hole cards are two of one suit, and one of another suit, I’ll mentally note something like “spades, heart”. That way, if both hit the flop, I’ll automatically bet, and otherwise I’ll know if I flop a 3-card flush that I might bet. Similarly, remembering “spades, heart”, I’ll know if I have a 3-card flush or better or not on the river.

Same Suit Bonus (w/ 3-Card Straight Flush Payout)

Outcome Combinations Frequency Payout Return
6-or-7 Card Straight Flush 1,624 0.000012 500 0.006069
5 Card Straight Flush 39,312 0.000294 100 0.029385
4 Card Straight Flush 636,272 0.004756 20 0.095119
7 Card Flush 6,664 0.000050 250 0.012415
6 Card Flush 256,620 0.001918 50 0.095908
5 Card Flush 3,550,872 0.026542 5 0.132709
3 Card Straight Flush 6,736,184 0.050351 3 0.151053
4 Card Flush 22,152,936 0.165587 1 0.165587
Nothing 100,404,096 0.750491 -1 -0.750491
Total 133,784,560  1.000000   -0.062246

Advanced Blind Strategy for 6 Card Poker

Posted in six card poker by stephenhow on July 29, 2022

I’ve been playing a lot of Six-Card Poker at my local casinos, as it’s pretty relaxing to play the Ante bet and the Aces Up bonus. Occasionally, I’ll play the 2-Way Bad Beat bonus, depending on my mood, and the people at the table. But generally, its 10.8% house edge takes all the fun out of that side bet.

On the other hand, I don’t mind giving up a little house edge in order to play some hands blind, especially when the dealer’s three upcards look harmless. It’s pretty funny, given that most people spend a lot of time squeezing their hands, looking for enough to call the dealer. Instead, I realized that for certain weak dealer upcards, it only costs about 5% of reduced EV to call the hand blind. This may sound like a lot, given that I won’t play the Bad Beat bonus because of it’s 10.8% house edge. But overall, I only call about 22% of the hands blind, which total to a 1.0% penalty per hand relative to perfect strategy. It’s worth all the fun, the lulz, and the effort saved.

The table below breaks down the blind call strategy for the given hierarchy of dealer upcard types, prioritized in top-down order. Note that each row of the table pulls all the remaining hands encompassed by the description type, and the rest fall down through the conditions below. I suggest playing blind for only the bottom two rows of the table, which add up to 22% of all hands dealt, with total a per-hand cost of 1.0% of the Ante. I only play blind against J-high or lower, not paired, not all suited, that don’t reach to a straight. You can play more hands, but at the costs listed in the table. (Note the cost of playing all hands blind adds up to about 18% of the Ante.)

Dealer Upcard TypeFrequencyBlind Call
Cost
Total Cost
Three-of-a-Kind, else0.0023-94.2%-0.0022
any pair, else0.1695-55.8%-0.0946
any Ace, else0.1910-19.3%-0.0369
any King, else0.1591-11.7%-0.0186
any Queen, else0.1304-6.7%-0.0087
all three suited, else0.0218-8.3%-0.0018
no-gap (e.g., 4-5-6), else0.0161-8.4%-0.0013
one-gap (e.g., 4-5-7), else0.0435-6.6%-0.0029
two-gap (e.g., 4-6-8, or 4-5-8), else0.0490-5.6%-0.0027
other two suited, else0.1304-4.8%-0.0063
all other (rainbow)0.0869-4.6%-0.0040
Total1.0000-0.1800
Blind Play Stats for Top-Down Classification of Dealer Upcards

For the 22% of hands I play blind, most would have been played by basic strategy anyways. Only 18% of these blind calls would have been folds. Generally, it adds a bit of excitement to see your hand after the dealer’s, and usually, you don’t end up regretting the blind call. I don’t care about the cost, I play these hands blind. It usually makes for a fun table. Other people start playing blind too.

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Multiplier BlackJack @ Jamul Casino

Posted in Uncategorized by stephenhow on May 12, 2019

multiplierBJ

You know what we all need, besides a +EV game, or some ridiculously countable side-bet?  We need more fun at a blackjack table.  We also sometimes need a miracle just to get even at a blackjack table.  Both of these are offered by the new Multiplier Blackjack game at my local Jamul Casino, in Jamul, CA.

I did the math for the game inventors about 6 years ago.  I understand the game won the Best-in-Show award at the table games conference, and is growing in casino placements around the country.   It’s finally available in San Diego county, and I checked it out last night. Woo-hoo, it’s fun, and I actually won at a blackjack table for once!

The idea behind the game is simple.  All the rules are the same as Blackjack, but when you win against a dealer bust, you’re paid odds based on the dealer bust card.  The payouts are higher for a low bust card, and decrease to 1-to-2 for a picture card.  When the dealer busts with a 10-spot card (Ten), your winning wager just pushes.  Of course, the game excitement comes when you’re hoping for a dealer bust with a Six (pays 4-to-1), or any other non-10 valued card.

Pay Table
Dealer Bust-Card Payout
Six 4-to-1
Seven 3-to-1
Eight 3-to-2
Nine 3-to-2
Jack/Queen/King 1-to-2
Ten push

Why It’s Fun

Regular blackjack is boring for a lot of people.  I almost never play it, because I just don’t care about even-money games.  I walk by all the blackjack tables.  I’ll look at some of the odds-paying side bets, but it’s still not worth the effort of playing the main blackjack game.

The potential 4-to-1 payout of Multiplier Blackjack makes the game fun.  I really don’t care if I sometimes win 1-to-2 on a dealer bust with a picture, because it’s still a win.  It’s all part of the build-up towards a 4-to-1, or 3-to-1 win.  And, if that win comes on a multiply split hand with a double or two, that’s really exciting.  (In fact, that happened during my first short session, where I re-split Deuces to three hands, had a double-after-split, and the dealer busted with an Eight.)

I also like the way the table layout has betting spots for both regular blackjack, and Multiplier Blackjack.  That way, the player has the option of either standard blackjack, or the multiplier version.  This makes it easy for the casino to introduce the game to the player, pretty much at no floor-space cost.  This layout itself is a new innovation, where the player can choose between different blackjack versions on-the-fly, or weight wagers differently for the same hand.

As I mentioned before, there are sometimes during a session when an odds payout becomes attractive (or necessary).

Basic Strategy

The house edge for a six-deck shoe game with Late Surrender (LS), double after split (DAS), re-split up to 4 hands (SP4) including Aces (SPA4) is 1.92%.  So, pretty much for the cost of a 6-to-5 blackjack game, you get a lot of fun, and up to a 4-to-1 payout on wins.

I generated a basic strategy table for the Multiplier Blackjack rules, a six-deck shoe, and the above pay table.  There are a few differences from standard blackjack, notably the hits with hard-12 against a dealer 2-4 upcard.  There are a few more doubles with hard 9 and even hard 8 against a dealer 6 upcard.  Overall, the play is a little more aggressive, including splitting 4-4 against a dealer 5 or 6 upcard.

Hand Dealer Upcard
2 3 4 5 6 7 8 9 10 A
Soft Totals
A-10 S S S S S S S S S S
A-9 S S S S S S S S S S
A-8 S S S S D S S S S S
A-7 S S D D D S S H H H
A-6 H H D D D H H H H H
A-5 H H H D D H H H H H
A-4 H H H D D H H H H H
A-3 H H H D D H H H H H
A-2 H H H H D H H H H H
Hard Totals
20 S S S S S S S S S S
19 S S S S S S S S S S
18 S S S S S S S S S S
17 S S S S S S S S S Rs
16 S S S S S H H R R R
15 S S S S S H H H R R
14 S S S S S H H H H H
13 H S S S S H H H H H
12 H H H S S H H H H H
11 D D D D D D D D D H
10 D D D D D D D D H H
9 H H D D D H H H H H
8 H H H H D H H H H H
7 H H H H H H H H H H
6 H H H H H H H H H H
5 H H H H H H H H H H
Pairs
A-A P P P P P P P P P P
T-T S S S S S S S S S S
9-9 S P P P P S P P S S
8-8 P P P P P P P P P Rp
7-7 P P P P P P H H H H
6-6 H P P P P H H H H H
5-5 D D D D D D D D H H
4-4 H H H P P H H H H H
3-3 H H P P P P H H H H
2-2 H H P P P P H H H H

Countability

I checked the sensitivity of the house edge to the removal of a single card from the 6-deck shoe, to see if the game was somehow especially vulnerable to card-counting, because of the odds payout.  The sensitivity numbers (the effect-of-removal, or EORs) were of pretty standard magnitude.  And, because of the high initial house edge, it takes a much more distorted shoe to attain any +EV opportunities.  So, it looks like the game is fairly uncountable.

Effect-of-Removal (6 Decks)
Single Removed Card Rank EOR
Deuce +0.000931
Trey +0.001052
Four +0.001308
Five +0.001347
Six -0.000787
Seven -0.001300
Eight -0.000785
Nine -0.001285
Ten +0.000853
Jack/Queen/King -0.000082
Ace -0.001042

Premium Hold’Em

Posted in Uncategorized by stephenhow on June 6, 2018

Premium-Holdem-thumb

I noticed another new AGS game in my nearby Harrah’s Casino, called Premium Hold’Em, extending their products of 3-hole card poker games against the dealer.  I kind of enjoy squeezing these hole cards, catching minimal glimpses of colors and symbols, and making (correct) decisions without knowing my full hand.  Sometimes, this leaves me with emergency outs after seeing the dealer’s hand.

Plus, once you’ve played enough Ultimate Texas Hold’Em (UTH), all those decisions become automatic, and all you seem to notice is that string of miracle dealer hands which constantly scoop the table.  UTH can be boring *and* painful.

So, what’s new with AGS’s Premium Hold’Em?  Well, first, there’s the novelty and the squeezing of your three hole cards.  Next, the all-in preflop raise is lowered to 3x, which should reduce the variance a bit (from UTH’s 4x).  Then, the entire community board is dealt out at once as a four card “flop”.  Finally, you can either 2x, 1x, or fold after seeing your entire hand!  (Compare to UTH’s 2x decision before the turn+river.)  Of course, the dealer has three unseen hole cards, but the 2x option is still more favorable than in UTH.  Overall, these advantages are offset by the lowered 3x preflop raise, and the higher pair-of-treys Dealer qualifier.  Bottom lime, the house edge of Premium Hold’Em is lower than UTH, at 2.06% of an Ante.

Oh, and the bonus side bet pays down to Jacks Up (two pairs), and has a low house edge of 4.87%.  Again, this offers lower variance than the UTH Trips side bet.

Basic Strategy

I wanted to try out the game, so I worked out a Basic Strategy.  I worked it down to the detail that I like, using hand features that make sense to me.  The table is organized by the two decision points, and divided into mutually exclusive categories for the Player hand, and also for the board.  For each determined sub-category, the selected betting rules should be followed top-down, looking for the first matched condition, or else falling through to the bottom action.

The betting rules are meant to be concise and unambiguous, but I’ll elaborate on some of them below, to clarify with examples.

The Basic Strategy is sub-optimal by only 0.28% from the ideal 2.06% house edge.

You can practice the game for free at the AGS website.

Premium Hold’Em Basic Strategy
Decision Player Hand Board Prioritized Betting Rules
Preflop

(3x All-In

or

Check)

Trips 3x all Three-of-a-Kind hands.
Pair 3x pair of FIVE’s or better, else

check all others.

3-Suited 3x A-T-x all suited or higher, else

3x three suited cards all NINE or higher, else

check all others.

other 3x A-J-T ranks or all higher, else

check all others.

River

(2x, 1x, or Fold)

Royal Flush,

Straight Flush

2x all hands
Four-of-a-Kind
quads on board 2x with 1st or 2nd nut kicker, else

1x with 7th nut kicker or better, else

fold all others

other 2x all hands
Full House 2x all Full Houses
Flush 2x all Flushes
Straight
4-flush 1x Straight against 4-flush board
other 2x all Straights
Three-of-a-Kind
trips on board 2x trips on board with nut kicker in the hole, else

1x trips on board with 2nd or 3rd nut kicker in the hole, else

fold all others

4-flush 1x Three-of-a-Kind against scare flush
other 2x all hands
Two Pairs
double-paired 2x two better pairs, else

2x nut kicker, else

1x 2nd or 3rd nut kicker, else

fold all others

paired 2x “top pair” or “overpair”, else

2x “bottom pair” with 3rd nut or better kicker, else

1x all others

4-flush or

open-ended

1x all hands vs scare board
other 2x all hands
One Pair
pair on board 1x with nut kicker in the hole, else

1x with 2nd nut kicker in the hole and 2-flush max board, else

fold all others

4-flush or

open-ended

1x 2nd pair or better, else

fold all others

gutshot 1x bottom pair or better, else

fold all other underpairs

other 2x 2nd pair or better, when SIX’s or better, else

1x bottom pair or better, else

1x qualifying underpair, else

Fold all other underpairs

High Card
4-flush or

4-straight

Fold all hands
other 1x Ace-King with nut kicker in the hole vs rainbow board, else

fold all others

Typical play is actually pretty easy, and the Basic Strategy is intuitive and easy to learn.  The top part of the table tells you what the 3x preflop raising hands are.  They occur about 15.7% of the time, and are easy to remember.

All the river decisions for hands Three-of-a-Kind and higher are simple and intuitive.  Thankfully, you should 2x bet *all* full houses and flushes, independent of the board.  The only time you slow down with a straight is when you 1x it against a 4-flush board.  Notice you still 2x the idiot end straight against an open-ended board, and you still 2x a baby flush against a 4-flush board.  And you still 2x a flush against a double-paired board.

You’ll slow down with Three-of-a-Kind when they’re on board.  You will 2x them with a nut (best) kicker in the hole.  For example, say you’re holding Kh 9s 6h, and there’s trips on board with 8s 8c 8h Ad.  You have the nut (best) kicker in the hole (Kh), so you can still 2x your hand.  However, if your hole cards were Qh 9s 6h, you should only 1x the hand since your Qh is only 2nd nut kicker.  You could still 1x call with Jh 9s 6h (3rd nut kicker), but you would fold with anything lower than the 3rd nut kicker.

If you have Three-of-a-Kind and the board is a scare flush (4-flush), then you can still 1x your hand.  For example, if your hole cards were 7d 3s 3h and the board was 3c Kc Jc 6c, you’d only 1x your trip 3’s.

You’ll generally 2x your two pairs, unless the board is dangerous.  So, against a scare flush (4-flush) or a scare straight (open-ended) board, you’ll just 1x your two pairs.  You should 2x raise your two pairs any time you can beat a double-paired board, or even if you just have the nut kicker.  If the board is paired, you’ll 2x raise your top pair or over pair.  You can 2x raise with bottom pair, just as long as you have 3rd nut kicker or better.  You’ll never fold two pairs when you beat the board.  The only time you’ll fold with two pairs is when you’re playing the board, and don’t have 4th nut kicker or better.

Note: “bottom pair” on a paired board means you’ve paired the lowest singleton on the board.  For example, say the board is 3s 3h Kd 7h.  If you’re holding a 7, you’ve made bottom pair on the board.  If you’re holding a K, you’ve made top pair on the board.  If you have a pair of wired Aces, they’d be an over pair to the board.  If you have a pair of wired Deuces, they’d be an under pair to the board. Also, if you held a pair of wired Fives in the hole, they’d be an under pair to the board too (lowest board singleton is a Seven).

There are a few occasions when you can 2x raise one pair against a safe board (no 4-flush or 4-straight board, including gutshot board).  Against a safe board, you can 2x raise one pair if it’s an over pair, top pair, or second pair.

Generally speaking, you’ll at least 1x call any pair made with the board.  You will fold 3rd or bottom pair against a scare board.  You’ll only call a wired under pair to the board if it’s qualifying, and there’s no 4-flush or 4-straight on board.

You can 1x call playing one pair on board, if you have the nut kicker.  You can also 1x call the pair on board if you hold the 2nd nut kicker, and the board is 2-flush or less.

There’s only one case to 1x bet a no-pair hand on the river.  You should 1x play an Ace-King high hand against a rainbow flop when holding the nut kicker, and the board isn’t 4-cards to a straight.  For example, if your hole cards were Qh 8d 3s and the board was Ac Kh 9d 4s, then you should 1x your hand, because your Qh hole card is the nut kicker.

Collusion Analysis

The game is not vulnerable to even 5 confederates colluding at a full-table sharing perfect information.  Ideal decisions using all known player hole cards (15 of them at a full table) yield only about a +1.4% improvement over Basic Strategy (about +0.5% from counter-strategy pre-flop decisions, and about +0.9% from counter-strategy river decisions).

Bonus Side Bet

An optional bonus on your final hand, or the Dealer’s final hand, is available before the hand begins.  The table below shows the payouts and their frequencies and returns.  The house edge is a reasonable 4.87%, and it pays down to Jacks Up (two pairs), instead of the UTH Trips or better bonus.

Outcome Combinations Frequency Payout Return
ROYAL_FLUSH

4,324

0.000032

50

0.001616

STRAIGHT_FLUSH

37,260

0.000279

30

0.008355

FOUR_OF_A_KIND

224,848

0.001681

10

0.016807

FULL_HOUSE

3,473,184

0.025961

6

0.155766

FLUSH

4,047,644

0.030255

4

0.121020

STRAIGHT

6,180,020

0.046194

3

0.138581

THREE_OF_A_KIND

6,461,620

0.048299

2

0.096597

Two Pairs (J’s Up+)

173,854,08

0.129951

1

0.129951

other

95,970,252

0.717349

-1

-0.717349

total

133,784,560

1.000000

-0.048656

expected

133,784,560

Detailed Stats

The total outcomes for every possible starting hand, for every possible flop, and every possible dealer hole cards are shown in the table below, following optimal decisions.  The player will 3x about 15.7% of his hands, will 2x about 37.4% of his hands, will 1x about 23.9% of the hands, and will fold about 23.0% of the hands.

Outcome Combinations Frequency Net Return
Win 3x Play w/ ROYAL_FLUSH vs. qualified dealer

879,320,772

0.000013

504

0.006670

Win 3x Play w/ STRAIGHT_FLUSH vs. qualified dealer

2,149,315,348

0.000032

104

0.003364

Win 3x Play w/ FOUR_OF_A_KIND vs. qualified dealer

55,353,208,088

0.000833

14

0.011663

Win 3x Play w/ FULL_HOUSE vs. qualified dealer

602,898,278,304

0.009074

7

0.063516

Win 3x Play w/ FLUSH vs. qualified dealer

237,450,980,932

0.003574

5.5

0.019655

Win 3x Play w/ STRAIGHT vs. qualified dealer

191,445,164,564

0.002881

5

0.014406

Win 3x Play w/ THREE_OF_A_KIND vs. qualified dealer

575,993,062,524

0.008669

4

0.034675

Win 3x Play w/ TWO_PAIRS vs. qualified dealer

2,246,740,264,764

0.033814

4

0.135256

Win 3x Play w/ ONE_PAIR vs. qualified dealer

1,066,642,147,548

0.016053

4

0.064213

Lose 3x Play vs. qualified dealer

3,231,042,644,372

0.048628

-5

-0.243140

Tie 3x Play vs. qualified dealer

30,011,251,504

0.000452

0

0.000000

Win 3x Play w/ ROYAL_FLUSH vs. non-qualified dealer

201,445,188

0.000003

503

0.001525

Win 3x Play w/ STRAIGHT_FLUSH vs. non-qualified dealer

430,781,892

0.000006

103

0.000668

Win 3x Play w/ FOUR_OF_A_KIND vs. non-qualified dealer

3,718,604,400

0.000056

13

0.000728

Win 3x Play w/ FULL_HOUSE vs. non-qualified dealer

87,580,605,564

0.001318

6

0.007909

Win 3x Play w/ FLUSH vs. non-qualified dealer

65,138,805,780

0.000980

4.5

0.004412

Win 3x Play w/ STRAIGHT vs. non-qualified dealer

62,396,153,160

0.000939

4

0.003756

Win 3x Play w/ THREE_OF_A_KIND vs. non-qualified dealer

292,929,250,596

0.004409

3

0.013226

Win 3x Play w/ TWO_PAIRS vs. non-qualified dealer

508,732,581,216

0.007657

3

0.022970

Win 3x Play w/ ONE_PAIR vs. non-qualified dealer

1,045,415,883,192

0.015734

3

0.047201

Win 3x Play w/ HIGH_CARD vs. non-qualified dealer

71,345,648,256

0.001074

3

0.003221

Lose 3x Play vs. non-qualified dealer

22,949,828,544

0.000345

-4

-0.001382

Tie 3x Play vs. non-qualified dealer

1,115,495,892

0.000017

0

0.000000

Win 2x Play w/ ROYAL_FLUSH vs. qualified dealer

902,421,300

0.000014

503

0.006832

Win 2x Play w/ STRAIGHT_FLUSH vs. qualified dealer

13,145,193,656

0.000198

103

0.020377

Win 2x Play w/ FOUR_OF_A_KIND vs. qualified dealer

48,452,947,496

0.000729

13

0.009480

Win 2x Play w/ FULL_HOUSE vs. qualified dealer

891,034,206,768

0.013410

6

0.080462

Win 2x Play w/ FLUSH vs. qualified dealer

1,208,401,617,832

0.018187

4.5

0.081840

Win 2x Play w/ STRAIGHT vs. qualified dealer

1,833,221,994,724

0.027590

4

0.110362

Win 2x Play w/ THREE_OF_A_KIND vs. qualified dealer

1,548,010,040,012

0.023298

3

0.069894

Win 2x Play w/ TWO_PAIRS vs. qualified dealer

5,325,367,541,112

0.080148

3

0.240444

Win 2x Play w/ ONE_PAIR vs. qualified dealer

2,347,190,713,200

0.035326

3

0.105977

Lose 2x Play vs. qualified dealer

5,884,001,322,956

0.088556

-4

-0.354223

Tie 2x Play vs. qualified dealer

356,306,998,604

0.005363

0

0.000000

Win 2x Play w/ ROYAL_FLUSH vs. non-qualified dealer

164,326,140

0.000002

502

0.001242

Win 2x Play w/ STRAIGHT_FLUSH vs. non-qualified dealer

2,738,580,240

0.000041

102

0.004204

Win 2x Play w/ FOUR_OF_A_KIND vs. non-qualified dealer

1,966,734,000

0.000030

12

0.000355

Win 2x Play w/ FULL_HOUSE vs. non-qualified dealer

49,091,947,236

0.000739

5

0.003694

Win 2x Play w/ FLUSH vs. non-qualified dealer

339,829,796,400

0.005115

3.5

0.017901

Win 2x Play w/ STRAIGHT vs. non-qualified dealer

618,260,337,144

0.009305

3

0.027915

Win 2x Play w/ THREE_OF_A_KIND vs. non-qualified dealer

144,904,859,028

0.002181

2

0.004362

Win 2x Play w/ TWO_PAIRS vs. non-qualified dealer

1,898,618,140,944

0.028575

2

0.057149

Win 2x Play w/ ONE_PAIR vs. non-qualified dealer

2,363,506,427,088

0.035571

2

0.071143

Win 1x Play w/ FOUR_OF_A_KIND vs. qualified dealer

349,955,952

0.000005

12

0.000063

Win 1x Play w/ STRAIGHT vs. qualified dealer

6,321,867,792

0.000095

3

0.000285

Win 1x Play w/ THREE_OF_A_KIND vs. qualified dealer

55,773,134,484

0.000839

2

0.001679

Win 1x Play w/ TWO_PAIRS vs. qualified dealer

677,790,208,140

0.010201

2

0.020402

Win 1x Play w/ ONE_PAIR vs. qualified dealer

1,790,737,887,912

0.026951

2

0.053902

Lose 1x Play vs. qualified dealer

10,014,543,966,612

0.150721

-3

-0.452164

Tie 1x Play vs. qualified dealer

195,881,895,144

0.002948

0

0.000000

Win 1x Play w/ STRAIGHT vs. non-qualified dealer

1,944,063,612

0.000029

2

0.000059

Win 1x Play w/ THREE_OF_A_KIND vs. non-qualified dealer

521,670,744

0.000008

1

0.000008

Win 1x Play w/ TWO_PAIRS vs. non-qualified dealer

57,782,013,408

0.000870

1

0.000870

Win 1x Play w/ ONE_PAIR vs. non-qualified dealer

2,716,947,685,944

0.040891

1

0.040891

Win 1x Play w/ HIGH_CARD vs. non-qualified dealer

218,296,927,728

0.003285

1

0.003285

Lose 1x Play vs. non-qualified dealer

142,599,511,272

0.002146

-2

-0.004292

Tie 1x Play vs. non-qualified dealer

21,633,803,136

0.000326

0

0.000000

Fold

15,265,300,263,840

0.229747

-2

-0.459493

total

66,444,101,724,000

1.000000

-0.020583

expected

66,444,101,724,000

 

Chase The Flush

Posted in chase the flush by stephenhow on May 21, 2018

Chase-the-Flush-thumb

Ok, I’ll just come out and say it.  AGS’s (relatively) new Chase-the-Flush game “Makes Gambling Great Again” 🙂  I actually did the game development math on this a few years ago, when I wasn’t gambling much.  But this weekend I discovered a table at my local Hollywood Jamul Casino, so I worked out the Basic Strategy.  And guess what?  It’s a fun and elegant game!  It has a similar structure to Ultimate Texas Hold’Em, with an equal Ante and “Blind” (called the X-Tra Bonus), and 3x/2x/1x Play decisions.  But, the game is much more fun, because of the novel flush decisions, and because it’s a lot less frustrating and dread-inducing than the loved/hated UTH.  (Hint: the X-Tra pays off more frequently than the Blind, and a 3x pre-flop raise doesn’t miss the board as often as a 4x UTH bet.)

The Rules

The layout below shows the betting spots and payouts of the main game, and the pay table of the optional, independent Same Suit Bonus.  The game is played with a standard 52-card deck, where each player and the dealer receives three hole cards and shares a four-card community board to make their best-of-seven flush hand.

Chase-the-Flush-layout

The Player wagers an Ante and equal X-Tra Bonus bet before the hand begins.  Each Player and the Dealer receive three hole cards.  A Player may wager a 3x All-In bet based on his hole cards, or he may check and see the two-card flop.  The flop community cards are dealt, and a previously checking Player may now wager a 2x All-In bet, or check again.  The final two community board cards are dealt, and a previously checking Player must now wager a 1x All-In bet, or else fold his hand.

Each Player and the Dealer forms the highest flush made from their three hole cards and the four card community board.   The Dealer qualifies with a 3-card Nine-high flush or better.  If the Dealer doesn’t qualify, the remaining Antes are pushed back to the Player.  The qualified Antes and the All-In bet then receive even-money action against the Dealer hand.  The Player must beat the Dealer to receive the X-Tra Bonus payout listed in the pay table.  If the Dealer’s hand beats the Player’s hand, the X-Tra Bonus loses.  All bets push on a tie.

The House Edge

The house advantage for the main Chase-the-Flush game is only 2.65% of an Ante.  That’s very reasonable, and is comparable to the UTH house edge.  The Basic Strategy yields a practical -2.80% return to the player.  The Same Suit Bonus for the pay table in the above layout has a reasonable house edge of 5.67%.

Basic Strategy

I crafted out as simple a Basic Strategy as possible, in terms of how people intuitively view their hands during the game.  The following strategy shows the betting conditions for each of the 3x (pre-flop), 2x (flop), and 1x (river) decision points.  Check your hand for any of the betting requirements listed per decision point.  If your hand doesn’t match any of the listed conditions for the decision point, then you shouldn’t bet it.

You can practice the game for free at the AGS website.

Decision Betting Requirements
3x

(“pre-flop”)

Pair Aces or Kings with minimum singleton:

AA.4+, KK.J+

Three suited cards
Suited Ace
Suited King with minimum singleton:

KQs.3+, KJs.4+, KTs.5+, K9s.5+, K8s.6+, K7s.7+, K6s.7+, K5s.7+, K4s.7+, K3s.8+, K2s.8+

Suited Queen with minimum singleton:

QJs.J+, QTs.J+, Q9s.J+, QXs.Q+

Suited Jack with King+ singleton
Suited Ten w/ Ace singleton
Rainbow AK.7+, AQ.T+, AJ.J+
Check all others
2x

(“flop”)

4-card flush or better
3-card flush w/ 2-card flush using both board suits
3-card flush vs offsuit board
3-card qualifier using suited board with Six+ hole card
Nut 2-card flush using hole A or K plus another 2-card flush
Two 2-card flushes using board w/ Jack+ average hole cards
Check all others
1x

(“river”)

4-card flush or better
3-card flush vs rainbow board
3-card flush using the 2 suited cards of a 3-suit board
3-card flush higher than suited cards of a 3-suit board
3-card qualifier higher than singleton of a 3-suit board
3-card flush against double-suited board w/ less than 15 one-card beats
2-card flush against rainbow board w/ less than 10 one-card beats
Fold all others
Chase-the-Flush Basic Strategy

For optimal play, you’ll 3x raise about 23.8% of your hands, bet 2x on the flop about 24.9% of the time, 1x call on the river about 35.2% of the time, and otherwise fold about 16.1% of the time.

3x Pre-flop Examples

You should 3x Play any suited Ace.  For example, Ac-2c-2d has a EV(3x) of +68.6% and an EV(check pre-flop) of +59.9%.  So, it’s still worth +8.7% to 3x raise the hand instead of checking it.

You should 3x any pair of Aces with a Four or better kicker.  However, the hand is only +EV for A-A-6 or higher.

You should 3x a suited King with a sufficiently high singleton (i.e., the offsuit card).  For example, Kd-9d-6c has a EV(3x) of +45.2% and an EV(check pre-flop) of +43.3%, showing it’s slightly better to 3x raise the hand than check it.

You should 3x raise a rainbow AK, AQ, or AJ if the 3rd card is sufficiently high.  This means you should 3x AK8o, AQTo, AJJo etc.  You should check AK5o, AQ9o, AJTo, etc.

2x Flop Examples

The Basic Strategy bets almost all 3-card flushes on the flop.  The only exception is when the board is suited, and you’re using a hole card less than a Six to make the flush, AND you don’t have another 2-card flush.  Otherwise, you’re betting all other 3-card flushes (or better).  For example, say you’re holding Kh-7d-5c and the flop is Ac-2c.  You shouldn’t bet your 3-card flush, because your 5c kicker is less than a Six.  Notice however, if you were instead holding Kh-7h-5c, you’d 2x Play your 3-card club flush with Five kicker, because you also have a two card Kh-7h flush.

You can 2x bet a 2-card “nut” flush when you have any another 2-card flush.  For example, if you’re holding Ac-6d-5h and the flop is 5c 7d, you have the 2-card “nut” (i.e., highest possible) flush in clubs, along with another 2-card flush (7d-6d).  You should 2x Play this hand, because one of your hole cards makes the “nut” 2-card flush with a board card, and your hand makes another 2-card flush.  Note you shouldn’t bet your Ac-7d-6d hand with a board of 8c-Ah, because many single dealer heart cards (Nine or higher) beat your 2-card flush.

You can also bet two 2-card flushes that use both offsuit board cards with two hole cards averaging a Jack or higher.  For example, you can 2x Play your Kh-Qs-2d when the board flops a heart and a spade.

1x River Examples

The Basic Strategy bets almost all 3-card flushes on the river.  The only exception is when you’re playing a single small hole card to make your hand, and the board is double-suited.  In most of these cases, there are 15 or more single dealer cards that’ll beat your hand.

Otherwise, if the board is rainbow, you’ll always 1x Play any 3-card flush.

If the board has only two cards of one suit, and you have any 3-card flush, there are always less than 15 single dealer cards that’ll beat your hand, so you’ll always 1x play any 3-card flush.

If the board has a 3-card flush on board, you’ll 1x Play the board since Basic Strategy says to always call when there are less than 15 single dealer cards that’ll beat your hand (there are only 10 remaining cards of the flush suit).  However, you can get a little fancy, and fold if the board singleton is higher than the 3-card flush AND you don’t hold any cards of the singleton suit.

You can play a very high 2-card flush against a rainbow board if there are less than 10 single dealer cards that’ll beat your hand.  This usually means you can play a very high 2-card flush using the highest board card if it’s not paired on board.  For example, if the board is 9s-7h-6d-5c, you can 1x Play a Kh in the hole, since the only single dealer cards that will beat your Kh-7h is an As, Ks, Ah, Ad, Ac (5 of them).

Same Suit Bonus

While straight flushes don’t have any meaning in the main game, they are included in the pay table (along with 4+ card regular flushes) in the optional Same Suit Bonus bet.  The resulting payouts are very attractive, and add a nice dimension to the game.  The breakdown of the 7-card hand outcomes is listed in the table below, and show a total house edge of 5.67% (good as far as bonuses go).

Outcome Combinations Frequency Payout Return
6-or-7 Card Straight Flush 1,624 0.000012 2000 0.024278
5 Card Straight Flush 39,312 0.000294 100 0.029385
4 Card Straight Flush 636,272 0.004756 20 0.095119
7 Card Flush 6,664 0.000050 300 0.014899
6 Card Flush 256,620 0.001918 50 0.095908
5 Card Flush 3,550,872 0.026542 10 0.265417
4 Card Flush 25,735,424 0.192365 1 0.192365
Nothing 103,557,792 0.774064 -1 -0.774064
Total 133,784,560  1.000000 -0.056694

Optimal Play Statistics

The following table breaks down the total outcomes for the main Chase-the-Flush game, over all possible starting hands, using optimal decisions.  The total return in the lower right corner shows a house edge of 2.65% of the Ante.

Outcome Combinations Frequency Net Return
Win 3x Play w/ 7-card flush against qualified dealer

20,439,619,200

0.000051

204

0.010459

Win 3x Play w/ 6-card flush against qualified dealer

534,992,418,432

0.001342

24

0.032207

Win 3x Play w/ 5-card flush against qualified dealer

4,296,578,849,136

0.010777

9

0.096997

Win 3x Play w/ 4-card flush against qualified dealer

16,130,726,914,176

0.040462

5

0.202309

Win 3x Play w/ 3-card flush against qualified dealer

16,796,416,174,704

0.042132

4

0.168527

Lose 3x Play  against qualified dealer

30,809,847,740,400

0.077283

-5

-0.386413

Push 3x Play against qualified dealer

2,751,669,318,312

0.006902

0

0.000000

Win 3x Play w/ 6-card flush against unqualified dealer

24,404,889,600

0.000061

23

0.001408

Win 3x Play w/ 5-card flush against unqualified dealer

1,075,217,004,000

0.002697

8

0.021576

Win 3x Play w/ 4-card flush against unqualified dealer

6,377,470,048,800

0.015997

4

0.063988

Win 3x Play w/ 3-card flush against unqualified dealer

12,970,988,479,440

0.032536

3

0.097608

Win 3x Play w/ 2-card flush against unqualified dealer

1,600,580,385,168

0.004015

3

0.012045

Lose 3x Play  against unqualified dealer

1,162,087,560,552

0.002915

-4

-0.011660

Push 3x Play against unqualified dealer

478,678,665,600

0.001201

0

0.000000

Win 2x Play w/ 6-card flush against qualified dealer

227,291,635,008

0.000570

23

0.013113

Win 2x Play w/ 5-card flush against qualified dealer

4,704,150,904,080

0.011800

8

0.094398

Win 2x Play w/ 4-card flush against qualified dealer

21,499,155,021,948

0.053928

4

0.215712

Win 2x Play w/ 3-card flush against qualified dealer

14,714,103,160,440

0.036908

3

0.110725

Lose 2x Play  against qualified dealer

32,751,544,964,688

0.082153

-4

-0.328613

Push 2x Play against qualified dealer

622,124,227,116

0.001561

0

0.000000

Win 2x Play w/ 5-card flush against unqualified dealer

187,837,403,616

0.000471

7

0.003298

Win 2x Play w/ 4-card flush against unqualified dealer

6,488,002,635,144

0.016274

3

0.048823

Win 2x Play w/ 3-card flush against unqualified dealer

16,304,458,158,816

0.040898

2

0.081795

Win 2x Play w/ 2-card flush against unqualified dealer

987,169,878,672

0.002476

2

0.004952

Lose 2x Play  against unqualified dealer

710,513,189,700

0.001782

-3

-0.005347

Push 2x Play against unqualified dealer

79,383,252,492

0.000199

0

0.000000

Win 1x Play w/ 5-card flush against qualified dealer

393,192,506,064

0.000986

7

0.006904

Win 1x Play w/ 4-card flush against qualified dealer

10,828,061,228,676

0.027161

3

0.081482

Win 1x Play w/ 3-card flush against qualified dealer

20,718,789,206,988

0.051970

2

0.103941

Lose 1x Play  against qualified dealer

68,485,489,408,332

0.171787

-3

-0.515362

Push 1x Play against qualified dealer

7,086,006,696,552

0.017774

0

0.000000

Win 1x Play w/ 5-card flush against unqualified dealer

5,385,180,384

0.000014

6

0.000081

Win 1x Play w/ 4-card flush against unqualified dealer

1,985,444,394,456

0.004980

2

0.009960

Win 1x Play w/ 3-card flush against unqualified dealer

26,514,857,520,000

0.066509

1

0.066509

Win 1x Play w/ 2-card flush against unqualified dealer

1,746,004,992,372

0.004380

1

0.004380

Lose 1x Play  against unqualified dealer

2,094,365,166,192

0.005253

-2

-0.010507

Push 1x Play against unqualified dealer

362,165,402,664

0.000908

0

0.000000

folds

64,139,016,142,080

0.160885

-2

-0.321769

total

398,664,610,344,000

1.000000

-0.026470

expected

398,664,610,344,000

Tagged with:

Ultimate Casino War

Posted in Uncategorized by stephenhow on July 24, 2015

UCW_table cardI saw this new variant of Casino War at Barona Casino, where they player gets an option to swap his card and make a 1x Raise bet. Of course, the catch is the dealer gets two cards, and gets to use the highest one. I wanted to see what the strategy and house edge were, and to check if it was at all countable out of the One-2-Six CSM they use.

The rules are pretty simple. You’re dealt one card face up, and the dealer is dealt two cards face down. The dealer will use his highest card. You have the option to replace your card with the next card out of the shoe (CSM), but you must wager an additional 1x bet to do make this swap. Finally, you may wager an optional 1x Raise on your final hand.

The dealer reveals his hand, and all your bets receive action against the dealer high card. Wins win a Six or lower pay 2:1, else it pays even-money. Ties push, and there’s no “going to War”.

For a 6-deck CSM game, the house edge is a fair 2.56%.

The basic strategy is pretty simple. You should swap an Eight or lower card. You should Raise a Jack or higher final card.

I checked the countability in a CSM by assuming perfect play given 16 known cards before every hand. The EV barely changes by +/- 0.3%, and thus is never +EV.

Ultimate Casino War Optimal Outcomes (6 Decks)
Outcome Combinations Frequency Net Return
Win 3x bet with drawn A 165,477,312 0.035607 3 0.106820
Win 3x bet with drawn K 138,914,496 0.029891 3 0.089673
Win 3x bet with drawn Q 114,674,112 0.024675 3 0.074026
Win 3x bet with drawn J 92,756,160 0.019959 3 0.059877
Lose 3x bet with drawn card 163,441,152 0.035169 -3 -0.105506
Tie 3x bet with drawn card 97,187,328 0.020912 0 0.000000
Win 2x bet with drawn T 73,160,640 0.015742 2 0.031485
Win 2x bet with drawn 9 55,887,552 0.012026 2 0.024051
Win 2x bet with drawn 8 40,772,160 0.008773 2 0.017546
Win 2x bet with drawn 7 28,274,400 0.006084 2 0.012168
Win 2x bet with drawn 6 18,057,600 0.003886 4 0.015542
Win 2x bet with drawn 5 10,121,760 0.002178 4 0.008712
Win 2x bet with drawn 4 4,466,880 0.000961 4 0.003845
Win 2x bet with drawn 3 1,092,960 0.000235 4 0.000941
Lose 2x bet with drawn card 1,409,976,288 0.303394 -2 -0.606788
Tie 2x bet with drawn card 88,157,160 0.018969 0 0.000000
Win 2x bet with original A 306,488,448 0.065949 2 0.131898
Win 2x bet with original K 257,453,856 0.055398 2 0.110796
Win 2x bet with original Q 212,690,880 0.045766 2 0.091532
Win 2x bet with original J 172,199,520 0.037053 2 0.074107
Lose 2x bet with original card 301,682,880 0.064915 -2 -0.129830
Tie 2x bet with original card 179,437,536 0.038611 0 0.000000
Win 1x bet with original T 135,979,776 0.029260 1 0.029260
Win 1x bet with original 9 104,031,648 0.022385 1 0.022385
Lose 1x bet with original card 409,808,160 0.088181 -1 -0.088181
Tie 1x bet with original card 65,156,976 0.014020 0 0.000000
Total 4,647,347,640 1.000000 -0.0256406
Expected 4,647,347,640

According to Dan Lubin, there’s a version that pays 2:1 for a win with a Six, 3:1 for a win with a Five, 5:1 for a win with a Four, and 8:1 for a win with a Trey. For a 6-deck game, these payouts reduce the house edge to 1.27%. The basic strategy remains the same. Still, the game never gets +EV with only 16 known cards.

Ultimate Casino War Optimal Outcomes (6 Decks, 2-3-5-8 Pay Table)
Outcome Combinations Frequency Net Return
Win 3x bet with drawn A 165,477,312 0.035607 3 0.106820
Win 3x bet with drawn K 138,914,496 0.029891 3 0.089673
Win 3x bet with drawn Q 114,674,112 0.024675 3 0.074026
Win 3x bet with drawn J 92,756,160 0.019959 3 0.059877
Lose 3x bet with drawn card 163,441,152 0.035169 -3 -0.105506
Tie 3x bet with drawn card 97,187,328 0.020912 0 0.000000
Win 2x bet with drawn T 73,160,640 0.015742 2 0.031485
Win 2x bet with drawn 9 55,887,552 0.012026 2 0.024051
Win 2x bet with drawn 8 40,772,160 0.008773 2 0.017546
Win 2x bet with drawn 7 28,274,400 0.006084 2 0.012168
Win 2x bet with drawn 6 18,057,600 0.003886 4 0.015542
Win 2x bet with drawn 5 10,121,760 0.002178 6 0.013068
Win 2x bet with drawn 4 4,466,880 0.000961 10 0.009612
Win 2x bet with drawn 3 1,092,960 0.000235 16 0.003763
Lose 2x bet with drawn card 1,409,976,288 0.303394 -2 -0.606788
Tie 2x bet with drawn card 88,157,160 0.018969 0 0.000000
Win 2x bet with original A 306,488,448 0.065949 2 0.131898
Win 2x bet with original K 257,453,856 0.055398 2 0.110796
Win 2x bet with original Q 212,690,880 0.045766 2 0.091532
Win 2x bet with original J 172,199,520 0.037053 2 0.074107
Lose 2x bet with original card 301,682,880 0.064915 -2 -0.129830
Tie 2x bet with original card 179,437,536 0.038611 0 0.000000
Win 1x bet with original T 135,979,776 0.029260 1 0.029260
Win 1x bet with original 9 104,031,648 0.022385 1 0.022385
Lose 1x bet with original card 409,808,160 0.088181 -1 -0.088181
Tie 1x bet with original card 65,156,976 0.014020 0 0.000000
Total 4,647,347,640 1.000000 -0.0126955
Expected 4,647,347,640

DJ Wild Poker

Posted in collusion by stephenhow on June 23, 2015

DJ_Wild_PrintDJ Wild is a new “deuces wild” poker game against the dealer, using a standard 52-card deck plus one additional Joker. The game is pretty simple, where you wager an Ante and equal Blind bet before receiving a five card hand. You then decide to either 2x Play the hand, or fold. The Dealer also receives a five card hand, and always qualifies. The Ante and Play bets receive even money action against the Dealer hand, but the Blind only pays for a straight or better. The Blind pays nice odds for rare hands, but only pays about 6% of your hands.

The full analysis of the game shows a house edge of about 3.5% of an Ante.

When I first looked at this game, it looked like easy pickings for a table full of colluding advantage players. The confederates would silently share the number of Deuces or Jokers they held in their hands (using simple chip signaling). The whole table would know the number of outstanding Wild cards seen. Each player would 2x Play if they had better than the minimum hand needed for the given Wild count. It looked like the game was toast.

So, I quickly coded it all up to find the theoretical 6-way collusion edge. I was shocked to find that even perfect info sharing only yielded +0.5% between 6 players. You’d expect more of an edge on a perfect 2x Play decision and the always-qualifying Ante. Plus, you get the chance to “save” the Blind bet with a weak hand when the Wild count is high.

Anyways, I worked out a simple 6-way collusion strategy, just in case it turned out to be slighly +EV. The strategy just uses separate minimum calling hands for each Wild count (0 thru 5). The strategy below only decreases the house edge to 1.1%.

6-Way Collusion Strategy for DJ Wild Poker
Wild Count Minimum Play Hand
0 Pair Jacks
1 Pair Nines
2 Pair Sevens
3 Pair Fours
4 Ace-King high
5 Ace high

Well, at least we know now. No one needs to lose any sleep over this game.

Arizona Stud @ Red Wind Casino, WA

Posted in Uncategorized by stephenhow on July 30, 2014

Screen Shot 2014-07-30 at 9.21.14 PMArizona Stud is a new poker-based table game debuting at the Red Wind Casino in Olympia, WA next week (6 Aug 2014). In this game, both the Dealer and the player each receive three hole cards. The player must discard one of his hole cards before the flop, while the Dealer must use exactly two hole cards to make a hand. After the player discards, he may wager a Play bet of 2x-4x the Ante, or check pre-flop. The two card flop is then revealed, as well as one of the Dealer’s hole cards. If the player checked pre-flop, he must then make a 1x Play bet, or fold. Finally, the community river card and all Dealer hole cards are revealed. The Dealer qualifies with a hand of AK-high or better. The Ante pushes if the Dealer doesn’t qualify. The Play bet always receives even-money action against the Dealer hand.

The set of all possible outcomes for the optimal player is listed in the table below. The total in the lower right corner shows a house edge of 1.34% of the Ante. Note that you should either 4x bet pre-flop, or check. You should never only bet 2x.

Optimal Outcomes for Arizona Stud
Outcome Combinations Frequency Net Return
Win 4x Play w/ ROYAL_FLUSH against qualified dealer 59,240,916 0.000001 5 0.000005
Win 4x Play w/ FULL_HOUSE against qualified dealer 89,284,476,240 0.001605 5 0.008025
Win 4x Play w/ FLUSH against qualified dealer 10,295,059,284 0.000185 5 0.000925
Win 4x Play w/ STRAIGHT against qualified dealer 13,761,723,420 0.000247 5 0.001237
Win 4x Play w/ THREE_OF_A_KIND against qualified dealer 674,048,087,712 0.012117 5 0.060586
Win 4x Play w/ TWO_PAIRS against qualified dealer 1,233,004,030,272 0.022165 5 0.110827
Win 4x Play w/ ONE_PAIR against qualified dealer 3,533,244,131,304 0.063516 5 0.317580
Win 4x Play w/ HIGH_CARD against qualified dealer 44,095,696,596 0.000793 5 0.003963
Lose 4x Play against qualified dealer 5,323,636,585,296 0.095701 -5 -0.478507
Push 4x Play against qualified dealer 90,869,346,720 0.001634 0 0.000000
Win 4x Play w/ ROYAL_FLUSH against unqualified dealer 20,545,164 0.000000 4 0.000001
Win 4x Play w/ FLUSH against unqualified dealer 4,736,232,972 0.000085 4 0.000341
Win 4x Play w/ STRAIGHT against unqualified dealer 5,959,832,148 0.000107 4 0.000429
Win 4x Play w/ THREE_OF_A_KIND against unqualified dealer 350,836,147,584 0.006307 4 0.025227
Win 4x Play w/ TWO_PAIRS against unqualified dealer 28,557,204,480 0.000513 4 0.002053
Win 4x Play w/ ONE_PAIR against unqualified dealer 2,530,675,447,344 0.045493 4 0.181973
Win 4x Play w/ HIGH_CARD against unqualified dealer 1,146,771,919,728 0.020615 4 0.082461
Lose 4x Play against unqualified dealer 25,248,339,684 0.000454 -4 -0.001816
Push 4x Play against unqualified dealer 25,026,495,696 0.000450 0 0.000000
Win 1x Play w/ ROYAL_FLUSH against qualified dealer 94,841,496 0.000002 2 0.000003
Win 1x Play w/ STRAIGHT_FLUSH against qualified dealer 541,732,152 0.000010 2 0.000019
Win 1x Play w/ FOUR_OF_A_KIND against qualified dealer 6,309,658,080 0.000113 2 0.000227
Win 1x Play w/ FULL_HOUSE against qualified dealer 45,729,841,680 0.000822 2 0.001644
Win 1x Play w/ FLUSH against qualified dealer 51,704,956,552 0.000929 2 0.001859
Win 1x Play w/ STRAIGHT against qualified dealer 90,255,233,808 0.001622 2 0.003245
Win 1x Play w/ THREE_OF_A_KIND against qualified dealer 591,850,723,248 0.010640 2 0.021279
Win 1x Play w/ TWO_PAIRS against qualified dealer 1,068,681,540,840 0.019211 2 0.038423
Win 1x Play w/ ONE_PAIR against qualified dealer 4,443,972,518,832 0.079888 2 0.159776
Win 1x Play w/ HIGH_CARD against qualified dealer 188,023,085,280 0.003380 2 0.006760
Lose 1x Play against qualified dealer 10,848,202,319,420 0.195015 -2 -0.390029
Push 1x Play against qualified dealer 161,798,077,992 0.002909 0 0.000000
Win 1x Play w/ ROYAL_FLUSH against unqualified dealer 14,941,584 0.000000 1 0.000000
Win 1x Play w/ STRAIGHT_FLUSH against unqualified dealer 220,863,744 0.000004 1 0.000004
Win 1x Play w/ FLUSH against unqualified dealer 23,880,526,848 0.000429 1 0.000429
Win 1x Play w/ STRAIGHT against unqualified dealer 48,873,031,380 0.000879 1 0.000879
Win 1x Play w/ THREE_OF_A_KIND against unqualified dealer 34,291,273,536 0.000616 1 0.000616
Win 1x Play w/ TWO_PAIRS against unqualified dealer 301,557,935,124 0.005421 1 0.005421
Win 1x Play w/ ONE_PAIR against unqualified dealer 3,348,961,937,952 0.060203 1 0.060203
Win 1x Play w/ HIGH_CARD against unqualified dealer 2,842,212,690,936 0.051094 1 0.051094
Lose 1x Play against unqualified dealer 1,090,180,312,308 0.019598 -1 -0.019598
Push 1x Play against unqualified dealer 100,426,510,008 0.001805 0 0.000000
folds 15,186,972,477,600 0.273011 -1 -0.273011
total 55,627,620,048,000 1.000000 -0.013402
expected 55,627,620,048,000

The basic strategy for the game is listed in the table below, which returns a 1.70% house edge. The player should 4x his hand about 27% of the time, 1x call about 46% of the time, and fold the remaining 27% of the time.

The game looks like fun. The strategy is actually pretty simple, but you get to make the occasional decision. I’ll actually be in Seattle next week (my first time), so I’ll try to check out the game. Maybe I could hit a nice bad beat for once.

Arizona Stud Basic Strategy
Decision Strategy
discard Hold pair, else
hold two highest cards.
Advanced exception: hold highest and lowest cards when suited, AND
highest two cards aren’t suited, AND highest card is Eight or better, AND
middle card is Six or lower, AND lowest card is only one rank below middle
card.
4x / check 4x raise any pair, else
4x raise suited Ace and Nine or better, else
4x raise Ace and Ten or better, else
check.
1x / fold 1x call three-of-a-kind, else
1x call any pair beating the dealer by more than a kicker, else
1x call same pair as dealer plus Ten or better kicker, else
1x call open-ended straight flush draw, else
1x call flush draw or any straight draw when beating the dealer, else
1x call flush draw or open-ended straight draw when dealer has no pair, else
1x call with higher hand (Jack or better kicker), else
fold all others.

The optional 2 Pair Plus Bonus bet pays for the final hand made by the player. The house edges for the various offered paytables are listed below.

2 Pair Plus Paytables
Player Hand Paytable A Paytable B Paytable C Paytable D
Royal Flush 500-to-1 500-to-1 500-to-1 500-to-1
Straight Flush 200-to-1 200-to-1 200-to-1 200-to-1
Four-of-a-Kind 100-to-1 100-to-1 100-to-1 80-to-1
Full House 50-to-1 50-to-1 40-to-1 40-to-1
Flush 30-to-1 25-to-1 30-to-1 30-to-1
Straight 20-to-1 20-to-1 20-to-1 20-to-1
Three-of-a-Kind 6-to-1 6-to-1 6-to-1 6-to-1
Two Pairs 4-to-1 4-to-1 4-to-1 4-to-1
others lose lose lose lose
House Edge 3.03% 5.12% 5.53% 6.58%

The Player Bad Beat Bonus bet pays when a player’s Jacks-or-Better hand is beat by the Dealer. The following table shows the optimal outcomes for the strategy maximizing the Bad Beat Bonus return. The house edge for the optimal Bad Beat Bonus strategy is 8.00%.

Player Bad Beat Bonus
Player Beat Hand Combinations Frequency Payout Return
Straight Flush 142,560 0.000000 1000 0.000008
Full House 1,324,642,176 0.000071 500 0.035719
Flush 2,719,437,696 0.000147 300 0.043998
Staight 1,597,456,728 0.000086 200 0.017230
Three-of-a-Kind 49,285,841,520 0.002658 30 0.079740
Two Pairs 257,968,615,536 0.013912 20 0.278245
Jacks-or-Better 923,384,598,264 0.049798 8 0.398385
other 17,306,259,281,520 0.933327 -1 -0.9333273
total 18,542,540,016,000 1.000000 -0.080002

Screen Shot 2014-07-30 at 9.51.37 PM

1 Bet Threat @ Casino Pauma

Posted in Uncategorized by stephenhow on June 15, 2014

1bet_smI saw a new Hold’Em type game at Casino Pauma last week, and I thought I’d work out the numbers and give it a try. The game is pretty simple. You bet an Ante before the hand begins. After seeing your two hole cards, you may bet 2x preflop, or check. After the flop, you may 1x bet or check. The turn, river, and the dealer’s hole cards are then revealed. The dealer qualifies with a pair of 6’s or better. If the dealer doesn’t qualify, all post-Ante wagers push. If the dealer beats your hand, you lose all your remaining bets. If you beat a qualified dealer hand, you win all your bets. If you beat a non-qualified dealer, you only win 1/2 your Ante.

The game is a bit calmer than Ultimate Texas Hold’Em, since you only have a single Ante, and you can check it down to showdown (in fact, this happens 69.8% of the time). Plus, players may like the fact that they can make the 2x and 1x bets only when they have an advantage. (I.e., all properly made 2x and 1x bets are +EV.) And the Ante is only a -11.4% loser, on average. The optimal player makes a 2x preflop bet 11.2% of the time, and a 1x flop bet on 25.5% of the time. The dealer qualifies 69.1% of the time. The game has relatively low variance, and I found myself increasing the Ante from the $5 minimum, to $10, and $15. (I’d never do that with UTH.)

The total outcomes for the optimal player strategy are listed in the table below, and show a house edge of 3.2% of the Ante.

1 Bet Threat Optimal Outcomes
Outcome Combinations Frequency Net Return
Bet 2x and 1x and beat qualified dealer 884,580,718,240 0.031804 4 0.127215
Bet 2x and 1x and beat non-qualified dealer 505,981,246,728 0.018192 0.5 0.009096
Bet 2x and 1x and lose to qualified dealer 374,729,986,984 0.013473 -4 -0.053891
Bet 2x and 1x and lose to non-qualified dealer 5,856,935,220 0.000211 -1 -0.000211
Bet 2x and 1x and tie dealer 25,182,150,868 0.000905 0 0.000000
Bet 2x only and beat qualified dealer 293,907,701,760 0.010567 3 0.031701
Bet 2x only and beat non-qualified dealer 387,449,913,432 0.013930 0.5 0.006965
Bet 2x only and lose to qualified dealer 524,307,039,216 0.018851 -3 -0.056552
Bet 2x only and lose to non-qualified dealer 76,858,269,780 0.002763 -1 -0.002763
Bet 2x only and tie dealer 25,553,189,772 0.000919 0 0.000000
Bet 1x only and beat qualified dealer 2,434,367,467,360 0.087524 2 0.175047
Bet 1x only and beat non-qualified dealer 1,467,870,962,280 0.052775 0.5 0.026387
Bet 1x only and lose to qualified dealer 1,215,166,965,412 0.043689 -2 -0.087379
Bet 1x only and lose to non-qualified dealer 17,931,292,692 0.000645 -1 -0.000645
Bet 1x only and tie dealer 164,852,060,176 0.005927 0 0.000000
Bet ante only and beat qualified dealer 3,363,692,256,360 0.120936 1 0.120936
Bet ante only and beat non-qualified dealer 4,003,403,426,760 0.143936 0.5 0.071968
Bet ante only and lose to qualified dealer 9,229,633,097,868 0.331836 -1 -0.331836
Bet ante only and lose to non-qualified dealer 1,896,770,105,748 0.068195 -1 -0.068195
Bet ante only and tie dealer 915,715,237,344 0.032923 0 0.000000
Total 27,813,810,024,000 1.000000 -0.032157

I worked out the basic strategy for the game, just in case anyone wants to play the game. The strategy is actually pretty simple. Since the dealer qualifies with a pair of 6’s or better, you generally only bet the flop if there’s a qualified hand to beat. You can bet kickers and draws against a qualified flop, otherwise you should only bet a qualifying pair when there’s a board card lower than your pair, but 6 or higher.

The basic strategy below has an error rate of 4.5%, that only results in a cost of 0.23% to the player. So the practical house edge is 3.5% for the game.

1 Bet Threat Basic Strategy
Wager Player Hand Rules
2x Pairs 2x bet a pocket pair of 7’s or better, else
check pocket 2’s thru 6’s.
Suited Bet QJs, KTs, KJs, KQs, and A8s or better, else
check all others.
Offsuit Bet KQo, and ATo or better, else
check all others.
1x Straight or better Always bet.
Three-of-a-Kind Always bet, except if trips on flop and less than 2nd nut kicker.
Two Pairs Bet if flop not paired, else
bet if flop qualified (pair 6’s or better), else
bet if board has undercard to pairs, else
bet 9’s up or better, else
check all others.
One Pair
(qualified board has pair 6’s or better)
Bet nut kicker, else
bet flush draw, else
bet open-ended straight draw with both holecards > 8, else
check all others.
One Pair
(small pair on board)
Always check.
One Pair
(unpaired board)
Bet if board has any qualifying undercards to pair, else
bet pair w/ flush draw, else
bet pair 9’s or better, else
check all others.
No Pair Bet 1st or 2nd nut flush draw, else
check all others.

There’s not much opportunity for collusion in the game. Knowledge of the hole cards of all 6 players will modify some of the preflop 2x decisions, but the frequency and value of these counter-(basic)strategy decisions aren’t enough to overcome the 3.2% house edge. Trust me, I’d have worked it out if it was worthwhile.

There’s two bonus bets offered, where the Pocket Bonus pays when your hole cards make a pocket pair, and the Final Hand bonus on your final 7-card hand. The paytables offered at Casino Pauma aren’t very good.

Pocket Bonus
Outcome Combinations Frequency Payout (to-1) Return
Pocket A’s 6 0.004525 50 0.226244
Pocket J’s – K’s 18 0.013575 20 0.271493
Pocket 2’s – T’s 54 0.040724 8 0.325792
no pair 1,248 0.941176 -1 -0.941176
Total 1,326 1.000000 -0.117647
Final Hand Bonus
Outcome Combinations Frequency Payout (to-1) Return
Royal Flush 4,324 0.000032 250 0.008080
Straight Flush 37,260 0.000279 50 0.013925
Four-of-a-Kind 224,848 0.001681 15 0.025210
Full House 3,473,184 0.025961 5 0.129805
Flush 4,047,644 0.030255 4 0.121020
Straight 6,180,020 0.046194 3 0.138581
Three-of-a-Kind 6,461,620 0.048299 2 0.096597
Jacks Up 17,385,408 0.129951 1 0.129951
others 95,970,252 0.717349 -1 -0.717349
Total 133,784,560 1.000000 -0.054179

Flush Rush @ The D Casino, Las Vegas

Posted in Uncategorized by stephenhow on May 3, 2014

Screen Shot 2014-05-03 at 3.32.29 PM

A reader told me about a new ShuffleMaster game at The D Casino, where you try to make a 4- to 7- card flush, starting with 4 hole cards, and paying to see 5th/6th and 7th Streets on a community board. The betting structure is similar to Mississippi Stud, where you post an Ante, then make a 1x Play decision to see 6th Street, and a final 1x Play decision to see 7th Street. The game pays odds on the Ante if you make a 4-card flush or better, and even-money on the 1x Play bets. Otherwise, if you fold or don’t make a hand, you lose your bets.

Ante Pay Table
Length Flush Straight Flush
7 300-to-1 1000-to-1
6 20-to-1 500-to-1
5 9-to-1 100-to-1
4 5-to-1 15-to-1

I believe The D will award the highest possible payout for a given hand. So, if you make a 5-card flush that contains a 4-card straight flush, they’ll pay you 15-to-1 (instead of 9-to-1). With this liberal rules interpretation, the house edge is 3.75%. The total possible outcomes for an optimal player are listed below.

Optimal Play Outcomes (Liberal Rules)
Outcome Combinations Frequency Net Return
7-card Straight Flush 3,360 2.3919E-07 1002 0.000240
6-card Straight Flush 167,160 1.1900E-05 502 0.005974
7-card Flush 697,620 4.9662E-05 302 0.014998
5-card Straight Flush 4,127,760 0.000294 102 0.029972
6-card Flush 26,945,100 0.001918 22 0.042119
4-card Straight Flush 65,648,544 0.004673 17 0.079447
5-card Flush 372,841,560 0.026542 11 0.291959
4-card Flush 2,627,978,496 0.187080 7 1.309557
Nothing 5,035,629,456 0.358475 -3 -1.075424
Fold before river 4,431,366,576 0.315459 -2 -0.630917
Fold before flop 1,481,973,168 0.105498 -1 -0.105498
Total 14,047,378,800 1.000000 -0.037493

If the rules are interpreted strictly, and you must make a straight flush with all your cards of the same suit, then the house edge is 5.41%.

Optimal Play Outcomes (Strict Rules)
Outcome Combinations Frequency Net Return
7-card Straight Flush 3,360 2.3919E-07 1002 0.000240
7-card Flush 717,360 5.1067E-05 302 0.015422
6-card Straight Flush 147,420 1.0494E-05 502 0.005268
6-card Flush 27,960,660 0.001990 22 0.043790
5-card Straight Flush 3,112,200 0.000222 102 0.022598
5-card Flush 397,427,940 0.028292 11 0.311212
4-card Straight Flush 41,062,164 0.002923 17 0.049693
4-card Flush 2,627,978,496 0.187080 7 1.309557
Nothing 5,035,629,456 0.358475 -3 -1.075424
Fold before river 4,431,366,576 0.315459 -2 -0.630917
Fold before flop 1,481,973,168 0.105498 -1 -0.105498
Total 14,047,378,800 1.000000 -0.054059
All-Or-Nothing Side Bet
Outcome Combinations Frequency Net Return
All hole cards same suit 2,860 0.010564 30 0.316927
All hole cards different suits 28,561 0.105498 5 0.527491
Others 239,304 0.883938 -1 -0.883938
Total 270,725 1.000000 -0.039520

Of course, the only reason why I analyzed the game was to Monte Carlo the 6-way collusion edge. The return is about +4.07% for 6 players sharing perfect info under strict rule interpretation, and +5.67% under the liberal rules. That’s not much, considering it’s pretty hard to convey suit information between confederates. It’s probably not worth anyone’s trouble to attack the game. I didn’t bother working out a practical strategy.

(FYI, I’m spending a lot more time outside of the casino these days. Before, I used to practically live in the casino. About 9 months ago, I changed obsessions. You can read about my current mania on my other blog.)