FA-83503 / Card game rule engines / Member archive

Matching rank without suit is refused · case 03

A seven cannot be played on a seven of another suit.

Member previewVariant 3 · 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 6	`false`	`true`	Failed

MEMBER ARCHIVE

The complete case is available to members.

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

Member access is invitation-based. Sign in with your invited account to inspect the sources.