FA-83950 / Sports scoring and tiebreakers / Member archive

Point-by-point service starts when only one player reaches ten · case 05

At 10-6 the server changes every point instead of every two points.

Member previewVariant 5 · 3 implementations · 10 checks per implementation

Case contract

One table tennis game to 11 with a two-point lead; later rallies are ignored. Service changes after every two points; once both players have at least 10 points it changes after every point. Return [a, b, winner, None] when finished, else [a, b, None, next server].

Why this case matters

Match software must show who serves next, especially after 10-10.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
regression: expedited deuce condition	`[10, 8, null, "A"]`	`[10, 8, null, "B"]`	Failed

MEMBER ARCHIVE

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

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