7 Card Hand Evaluators

[mykey1961]

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If someone could figure out a way to assign a unique index value between 1 and 133784560 for 7 unordered cards, you could dump everything into a 133 MB lookup table.


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Single byte for hand's strength is not enough, so the table must be 266 MB at least.

Andrzej Nironen

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Actually it can be done in under 133 MB...


I've got an array of approx 30 million integers.

One way of accessing a hand ranking is:


Rank := Eval[Eval[Eval[Eval[Eval[Eval[Eval[c1]+c2]+c3]+c4]+c5]+c6]+c7];

The general idea is there are:

1 card hands. 52x52
2 card hands. 1326x52
3 card hands. 22100x52
4 card hands. 84448x52
5 card hands. 152607x52
6 card hands. 352443x52

For each N card hand, there are 52 vectors to the appropriate N+1 card hand.

For 6 card hands, instead of vectors to the 7 card hand, the array holds the Hand Ranking of the 7 card hand.