K9s vs K9o: preflop equity

In equity, K9s against K9o stands at 52.49% to 47.51%, a gap of 4.98 points.

K9s

52.49%

Wins 7.16%, ties 90.67%

K9o

47.51%

Wins 2.17%, ties 90.67%

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

K9s against K9o: the numbers

Exact preflop results for K9s against K9o, in percent
HandWinsTiesLosesEquity
K9s7.15890.6692.17352.492
K9o2.17390.6697.15847.508

The matchup pits a suited hand against an offsuit hand. The two classes use the same two ranks and differ only in suits, so the suited hand is ahead mainly by making flushes.

This is close to even money, with K9s a little ahead. Of every 100 boards, about 90.67 are split pots, and the equity figures already include them.

In the ranking of all 169 starting hands, K9s is number 29 and K9o is number 40.

Boards behind the percentages: 41,095,296 counted in all
HandBoards won, aboutBoards tied, aboutBoards lost, about
K9s2,942,00037,261,000893,000
K9o893,00037,261,0002,942,000

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.

K9s against K9o read as odds
HandEquity as odds (to 1)Wins one deal inLoses one deal inPot odds needed to call (to 1)
K9s1.10513.97046.0190.905
K9o0.90546.01913.9701.105

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

By flop texture, K9s' equity runs from 50.29% on monotone flops up to 53.28% on two-tone flops. K9s stays ahead on all five textures, and the gap between its best and worst is only 2.99 points, so the shape of the flop hardly changes who is favored.

K9s against K9o by flop texture, in percent
FlopShare of flopsK9s winsTiesK9o winsK9s equity
Rainbow, ten or higher24.5953.29696.7040.00051.648
Rainbow, nine or lower6.3143.32296.6780.00051.661
Two-tone46.3638.82988.9012.27053.280
Monotone5.15218.51563.54017.94550.285
Paired17.5766.20192.6811.11852.541

Flop types: rainbow means three different suits, two-tone means one suit twice, monotone means one suit three times, paired means a repeated rank.

Compared with a random hand

Against one random hand instead, K9s holds 59.99% and K9o holds 57.81%. Facing each other changes that by -7.50 points for K9s and -10.30 points for K9o.

K9s and K9o here compared with each against a random hand, in percent
CaseEquity hereAgainst a random handChange in pointsTimes the random-hand equity
K9s, all flops52.49259.988-7.4960.87504
K9s, rainbow, ten or higher51.64859.988-8.3400.86097
K9s, rainbow, nine or lower51.66159.988-8.3270.86119
K9s, two-tone53.28059.988-6.7080.88818
K9s, monotone50.28559.988-9.7030.83825
K9s, paired52.54159.988-7.4470.87586
K9o, all flops47.50857.812-10.3040.82177
K9o, rainbow, ten or higher48.35257.812-9.4600.83637
K9o, rainbow, nine or lower48.33957.812-9.4730.83614
K9o, two-tone46.72057.812-11.0920.80814
K9o, monotone49.71557.812-8.0970.85994
K9o, paired47.45957.812-10.3530.82092

Does a shared suit matter?

The hands cannot hold a suit in common here, which leaves a single case and a single number: 52.49% for K9s.

K9s against K9o by suit overlap, in percent
DealsSpecific dealsShare of dealsK9s winsTiesK9o winsK9s equity
Share a suit00.00not possiblenot possiblenot possiblenot possible
No shared suit24100.007.15890.6692.17352.492

How often this matchup comes up

Exactly 24 specific deals fit this matchup in one seat order, which is 0.0015% of 1,624,350; both orders together give 48, or 0.0030%.

A worked example

Take a $200 pot built from $100 each. K9s' equity of 52.49% is worth $104.98, a $4.98 edge, and K9o's 47.51% is worth $95.02, which is $4.98 under its stake.

Scaled to 1,000 deals, that is roughly 71 wins for K9s, 22 for K9o and 907 chopped pots.

The same matchup from the other side

Swap the hands and you get K9o with 47.51% against K9s with 52.49%. We keep one page per matchup, with the better-ranked hand first.

Open the calculator with Ks9s against Kh9d 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 K9s against K9o 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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