53s vs 43s: preflop equity

Over all 1,712,304 boards that can follow this deal, 53s finishes with 58.26% of the pot and 43s with 41.74%.

53s

58.26%

Wins 42.52%, ties 31.48%

43s

41.74%

Wins 26.00%, ties 31.48%

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

53s against 43s: the numbers

Exact preflop results for 53s against 43s, in percent
HandWinsTiesLosesEquity
53s42.52131.48125.99858.262
43s25.99831.48142.52141.738

The matchup is suited hands on both sides, 53s against 43s. Because the hands share one rank, the one with the higher kicker is ahead when that rank pairs and the other hand is mostly drawing.

The lead is steady rather than large, and the flop still has plenty of say in who wins. 31.48% of boards are ties, so the equity of each hand is its win rate plus half of that.

By strength against a random hand, 53s holds place 146 of 169 and 43s holds place 150.

Boards behind the percentages: 20,547,648 counted in all
HandBoards won, aboutBoards tied, aboutBoards lost, about
53s8,737,0006,469,0005,342,000
43s5,342,0006,469,0008,737,000

12 specific deals times 1,712,304 boards gives the exact total. The won, tied and lost counts are approximations from the five-decimal percentages, rounded to the nearest thousand.

53s against 43s read as odds
HandEquity as odds (to 1)Wins one deal inLoses one deal inPot odds needed to call (to 1)
53s1.3962.3523.8460.716
43s0.7163.8462.3521.396

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

Split by what the flop looks like, 53s peaks at 60.75% on low rainbow flops (nine high or lower) and bottoms out at 55.75% on monotone flops. 53s stays ahead on all five textures.

53s against 43s by flop texture, in percent
FlopShare of flops53s winsTies43s wins53s equity
Rainbow, ten or higher25.84442.15034.38923.46159.344
Rainbow, nine or lower5.06550.25520.98928.75660.750
Two-tone46.54344.10628.25627.63858.234
Monotone5.21544.01723.45632.52755.745
Paired17.33336.11041.28322.60756.751

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 39.69%, 53s changes by +18.57 points, and 43s, from 38.64%, by +3.10.

53s and 43s here compared with each against a random hand, in percent
CaseEquity hereAgainst a random handChange in pointsTimes the random-hand equity
53s, all flops58.26239.693+18.5691.46782
53s, rainbow, ten or higher59.34439.693+19.6511.49507
53s, rainbow, nine or lower60.75039.693+21.0571.53050
53s, two-tone58.23439.693+18.5411.46711
53s, monotone55.74539.693+16.0521.40440
53s, paired56.75139.693+17.0581.42975
43s, all flops41.73838.642+3.0961.08012
43s, rainbow, ten or higher40.65638.642+2.0141.05212
43s, rainbow, nine or lower39.25038.642+0.6081.01573
43s, two-tone41.76638.642+3.1241.08084
43s, monotone44.25538.642+5.6131.14526
43s, paired43.24938.642+4.6071.11922

Does a shared suit matter?

For this pair the shared-suit row is empty: the two hands cannot both own a card of one suit without reusing a card.

53s against 43s by suit overlap, in percent
DealsSpecific dealsShare of deals53s winsTies43s wins53s equity
Share a suit00.00not possiblenot possiblenot possiblenot possible
No shared suit12100.0042.52131.48125.99858.262

How often this matchup comes up

Exactly 12 specific deals fit this matchup in one seat order, which is 0.0007% of 1,624,350; both orders together give 24, or 0.0015%.

A worked example

Say each player puts $100 in before the flop, making a $200 pot. On average 53s takes back $116.52 of it, which is $16.52 more than it put in, and 43s takes back $83.48, $16.52 less than it put in.

Over a long run, 1,000 deals split into about 425 for 53s, 260 for 43s and 315 tied.

The same matchup from the other side

43s against 53s adds nothing new: it is 41.74% for 43s and 58.26% for 53s, the same figures reversed.

5s3s against 4h3h is a ready-made deal for the calculator, with no suit in common between the hands. The neighboring matchups below replace one hand with another of similar strength.

How this was computed

This is an exact count with no sampling. For the 12 ways to deal one 53s and one 43s without reusing a card, grouped by suit pattern, every one of the 1,712,304 possible boards is dealt and both seven-card hands are compared. A tie counts as half a win in the equity column, and each board is counted once under each of its ten three-card flops.

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

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