22 vs 65s: preflop equity

Averaged over every possible board, 65s is ahead of 22 by 4.04 points of equity, 52.02% to 47.98%.

22

47.98%

Wins 46.43%, ties 3.10%

65s

52.02%

Wins 50.47%, ties 3.10%

Equity counts a tie as half a win. Exact over every board.

22 against 65s: the numbers

Exact preflop results for 22 against 65s, in percent
HandWinsTiesLosesEquity
2246.4283.10150.47147.979
65s50.4713.10146.42852.021

The matchup pits a pocket pair against a suited hand. This is a pair against two overcards, a matchup that stays close because the other hand only needs one of its ranks to appear.

With only 4.04 points between them, the board decides this matchup far more than the cards in hand. 3.10% of boards are ties, so the equity of each hand is its win rate plus half of that.

For context, 22 sits at number 87 of 169 starting hands and 65s at number 128 when each is run against a random hand.

Boards behind the percentages: 41,095,296 counted in all
HandBoards won, aboutBoards tied, aboutBoards lost, about
2219,080,0001,274,00020,741,000
65s20,741,0001,274,00019,080,000

The total is exact: 24 specific deals times 1,712,304 boards. The three counts are approximate, worked out from the percentages to five decimals and rounded to the nearest thousand.

22 against 65s read as odds
HandEquity as odds (to 1)Wins one deal inLoses one deal inPot odds needed to call (to 1)
220.9222.1541.9811.084
65s1.0841.9812.1540.922

The last column is the break-even price: the pot odds a call needs to offer, as a ratio of pot to call.

Who is ahead on which flops

65s prefers low rainbow flops (nine high or lower), where it holds 64.99%, and likes paired flops least, where it holds 48.52%. 22 is ahead on rainbow flops topped by a ten or better and paired flops, even though it trails 65s when every flop is counted.

22 against 65s by flop texture, in percent
FlopShare of flops22 winsTies65s wins22 equity
Rainbow, ten or higher25.84450.0641.73448.20250.931
Rainbow, nine or lower5.06534.3301.35364.31735.007
Two-tone46.54545.6551.58952.75646.449
Monotone5.21245.5684.77049.66247.953
Paired17.33446.8789.20743.91551.481

A rainbow flop shows three suits, a two-tone flop repeats one suit, a monotone flop is a single suit, and a paired flop repeats a rank.

Compared with a random hand

How much does the opponent matter? Compared with its random-hand 50.33%, 22 changes by -2.35 points, and 65s, from 43.13%, by +8.89.

22 and 65s here compared with each against a random hand, in percent
CaseEquity hereAgainst a random handChange in pointsTimes the random-hand equity
22, all flops47.97950.334-2.3550.95321
22, rainbow, ten or higher50.93150.334+0.5971.01186
22, rainbow, nine or lower35.00750.334-15.3270.69549
22, two-tone46.44950.334-3.8850.92282
22, monotone47.95350.334-2.3810.95270
22, paired51.48150.334+1.1471.02279
65s, all flops52.02143.133+8.8881.20606
65s, rainbow, ten or higher49.06943.133+5.9361.13762
65s, rainbow, nine or lower64.99343.133+21.8601.50680
65s, two-tone53.55143.133+10.4181.24153
65s, monotone52.04743.133+8.9141.20666
65s, paired48.51943.133+5.3861.12487

Does a shared suit matter?

Split by suits, the deals give 65s 51.89% when the hands overlap in a suit and 52.15% when they do not. 65s does better with no shared suit, by 0.26 points.

22 against 65s by suit overlap, in percent
DealsSpecific dealsShare of deals22 winsTies65s wins22 equity
Share a suit1250.0046.5473.11950.33448.107
No shared suit1250.0046.3093.08250.60947.850

How often this matchup comes up

Out of 1,624,350 ways to deal two seats two cards each, 24 are 22 in one seat and 65s in the other (0.0015%); with the seats swapped too, 48 (0.0030%).

A worked example

To see what the equity is worth, imagine $100 each in a $200 pot. 65s is worth $104.04 on average (+$4.04); 22 is worth $95.96 (-$4.04).

Out of 1,000 deals you should see around 505 outright wins for 65s, 464 for 22, and 31 split pots.

The same matchup from the other side

65s against 22 adds nothing new: it is 52.02% for 65s and 47.98% for 22, the same figures reversed.

Open the calculator with 2s2h against 6d5d already entered, a deal with no shared suit, and change any card to try your own hand. The matchups after it each swap one hand for a nearby one in the ranking.

How this was computed

Nothing here is simulated. The 24 deals of 22 against 65s fall into a few suit patterns, each dealt against all 1,712,304 boards, with both best five-card hands compared on every board. Ties give each hand half a win, and the flop rows count a board under each of its ten flops.

Source: our own exact count from the GeorgeLiPoker poker math library. No outside data is used.

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