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Practical Poker Math

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3. Odds in Texas Hold’em<br />

After you subtract the 2 hole cards, the 2 cards that make the<br />

draw, and the 8 cards that would complete the Straight, there<br />

are 40 unseen cards left.<br />

With the possibility that the Flop will pair either a hole card<br />

or a board card, the number of possible 3-card Flops that<br />

WILL make an open ended Straight draw to one of the suited<br />

connectors is<br />

40 * 48 = 1,920<br />

We now have all the numbers needed to calculate the odds of<br />

flopping an open ended Straight draw with 2 connected<br />

cards in the hole:<br />

Total Possibilities = 19,600<br />

– WILLs = 1,920<br />

WILLNOTs = 17,680<br />

Odds of Flopping Open Ended Straight Draw<br />

WILLNOTs : WILLs<br />

17,680 : 1,920<br />

Reduce<br />

17,680 / 1,920 : 1,920 / 1,920<br />

9.2 : 1<br />

Suited Connectors >>> Straight<br />

With one of the above-mentioned suited connectors in the<br />

hole, to calculate the odds of flopping a Straight, including a<br />

Straight Flush, first find the number of possible 3-card combinations<br />

that will flop a Straight. With 7♦8♦ in the hole, there<br />

are 4 possible 3-card combinations that will make a Straight:<br />

82

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