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Fifth set played to 25 points · case 05

A deciding set is not closed at 15-13 and continues to 25.

Member previewVariant 5 · 3 implementations · 10 checks per implementation

Case contract

Best-of-five volleyball with rally scoring. rallies is a string of rally winners (A/B). Sets 1-4 are played to 25 and set 5 to 15, always win by two with no cap. The rally winner serves next; when the receiving team wins a rally (side-out) that team rotates once (rotation counter modulo 6). At the start of each set both rotation counters reset to 0 and the first server is first_serve in odd-numbered sets and the other team in even-numbered sets. Return [completed and current set scores as [a, b], match winner or None, rotation counters].

Why this case matters

Scoresheet apps track rotations to flag out-of-rotation faults and must reset them each set.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
regression: deciding set target	`[[[25, 0], [0, 25], [25, 0], [0, 25], [15, 0]], null, {"A": 0, "B": 0}]`	`[[[25, 0], [0, 25], [25, 0], [0, 25], [15, 0]], "A", {"A": 0, "B": 0}]`	Failed

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

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