KJo vs 44: preflop equity

If 44 and KJo get all the chips in before the flop, 44 owns 52.14% of the pot in the long run and KJo owns 47.86%.

KJo

47.86%

Wins 47.53%, ties 0.65%

44

52.14%

Wins 51.82%, ties 0.65%

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

KJo against 44: the numbers

Exact preflop results for KJo against 44, in percent
HandWinsTiesLosesEquity
KJo47.5340.64551.82147.857
4451.8210.64547.53452.143

KJo and 44 are an offsuit hand and a pocket pair, in that order. This is a pair against two overcards, a matchup that stays close because the other hand only needs one of its ranks to appear.

That is a slim edge: neither hand is far ahead. 0.65% of boards are ties, so the equity of each hand is its win rate plus half of that.

By strength against a random hand, KJo holds place 26 of 169 and 44 holds place 48.

Boards behind the percentages: 123,285,888 counted in all
HandBoards won, aboutBoards tied, aboutBoards lost, about
KJo58,603,000795,00063,888,000
4463,888,000795,00058,603,000

The total is exact: 72 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.

KJo against 44 read as odds
HandEquity as odds (to 1)Wins one deal inLoses one deal inPot odds needed to call (to 1)
KJo0.9182.1041.9301.090
441.0901.9302.1040.918

In the last column, a pot-to-call ratio at or above the figure makes a call break even or better at this equity.

Who is ahead on which flops

Across the five flop textures 44's equity moves by 34.38 points, from 45.03% on rainbow flops topped by a ten or better to 79.41% on low rainbow flops (nine high or lower). 44 is the favorite overall but falls behind on rainbow flops topped by a ten or better and monotone flops.

KJo against 44 by flop texture, in percent
FlopShare of flopsKJo winsTies44 winsKJo equity
Rainbow, ten or higher24.71754.8270.29444.87954.974
Rainbow, nine or lower6.31420.1020.98678.91220.595
Two-tone46.48548.0360.42051.54448.246
Monotone5.15149.4202.07748.50350.459
Paired17.33345.2221.19953.57945.822

Read the flop types this way: rainbow has three suits, two-tone has two cards of one suit, monotone has three, and paired repeats a rank.

Compared with a random hand

The table below sets each hand against its own random-hand baseline: a change of -12.71 points for KJo, from 60.57%, and -4.88 for 44, from 57.02%.

KJo and 44 here compared with each against a random hand, in percent
CaseEquity hereAgainst a random handChange in pointsTimes the random-hand equity
KJo, all flops47.85760.569-12.7120.79012
KJo, rainbow, ten or higher54.97460.569-5.5950.90763
KJo, rainbow, nine or lower20.59560.569-39.9740.34003
KJo, two-tone48.24660.569-12.3230.79655
KJo, monotone50.45960.569-10.1100.83308
KJo, paired45.82260.569-14.7470.75653
44, all flops52.14357.023-4.8800.91442
44, rainbow, ten or higher45.02657.023-11.9970.78961
44, rainbow, nine or lower79.40557.023+22.3821.39251
44, two-tone51.75457.023-5.2690.90760
44, monotone49.54157.023-7.4820.86879
44, paired54.17857.023-2.8450.95011

Does a shared suit matter?

Two kinds of deal exist here. In 60 of them the hands share a suit and 44 holds 52.06%. In 12 they do not, and it holds 52.57%. 44 does better with no shared suit, by 0.51 points.

KJo against 44 by suit overlap, in percent
DealsSpecific dealsShare of dealsKJo winsTies44 winsKJo equity
Share a suit6083.3347.6130.65851.72947.942
No shared suit1216.6747.1440.57852.27847.433

How often this matchup comes up

Counting specific cards, KJo against 44 appears in 72 of the 1,624,350 ordered heads-up deals (0.0044%), and in 144 when the seats are swapped too (0.0089%).

A worked example

With $100 from each side, the $200 pot is split on average as $104.28 for 44 and $95.72 for KJo; the first side gains $4.28 per all-in and the second gives up $4.28.

Think in thousands: about 518 of 1,000 go to 44, about 475 go to KJo, and about 7 are chopped.

The same matchup from the other side

44 against KJo adds nothing new: it is 52.14% for 44 and 47.86% for KJo, the same figures reversed.

The calculator link fills in KsJh against 4d4c, a deal where the two hands share no suit. Change any card to test your own hand. The neighboring matchups below swap one of the two hands for one of similar strength.

How this was computed

Method: exact enumeration. The 72 specific deals are grouped by suit pattern, each is run against all 1,712,304 boards, and both seven-card hands are scored. Equity adds half of every tie, and flop textures are tallied over the ten flops inside each board.

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

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