FA-82014 / Poker hand evaluation / Member archive

Card shared by hole and board goes undetected · case 04

An ace of hearts dealt both in hand and on the board produces a hand instead of "invalid".

Member previewVariant 4 · 3 implementations · 8 checks per implementation

Case contract

Input: {"variant": "plo" (4 hole cards) or "plo5" (5 hole cards), "hole": [...], "board": 3 to 5 cards}. The hand must use exactly two hole cards and exactly three board cards. Return the best category name, or "invalid" for a wrong hole count, a board outside 3-5 cards, or a duplicated card.

Why this case matters

Poker engines settle real money pots from these comparisons; a single misranked hand pays the wrong seat.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
duplicate across hole and board	`"three of a kind"`	`"invalid"`	Failed

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