FA-83499 / Card game rule engines / Member archive

The suit printed on the eight overrides the declared suit · case 04

After an eight declared hearts, the eight own suit is still playable.

Member previewVariant 4 · 3 implementations · 8 checks per implementation

Case contract

Input [card, top_card, declared_suit_or_None]. Eights are always playable. When the top card is an 8 with a declared suit, only that suit (or an 8) may follow. Otherwise match suit or rank. Return a bool.

Why this case matters

Card-game engines, scoring apps and online tables apply this rule automatically on every hand.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
playable case 0	`true`	`false`	Failed

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This record includes three runnable implementations, regression fixtures, execution results, and source hashes.

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