FA-84289 / Sports scoring and tiebreakers / Member archive

Countback skips failures at the best height · case 04

An athlete with a first-attempt clearance at the best height is ranked below one who needed three.

Member previewVariant 4 · 3 implementations · 9 checks per implementation

Case contract

High jump placing. records rows are [name, [[height_cm, attempts], ...]] where attempts is a string of X (failure), O (clearance) or "-" (pass). Best height is the highest cleared. Rank by best height descending, then fewest failures at the best height, then fewest total failures at heights up to and including the best; athletes equal on all three share the place (the next place is skipped). Athletes without a clearance come last with place None in name order. Return [place, name, best].

Why this case matters

Vertical jump results depend on countback rules that are easy to misapply.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
regression: best height misses	`[[1, "Dee", 186], [2, "Ade", 183], [2, "Cy", 183]]`	`[[1, "Dee", 186], [2, "Cy", 183], [3, "Ade", 183]]`	Failed

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