FA-83307 / Go territory scoring / Member archive

The half glyph is not recognised · case 02

Komi written as 6½ is rejected.

Member previewVariant 2 · 3 implementations · 8 checks per implementation

Case contract

Input a komi string: optional sign, whole points, and an optional half written ".5"/".0" or "½". A bare half ("½", ".5") is allowed. Return komi in tenths or "invalid".

Why this case matters

Go servers and scoring tools compute this value automatically; a wrong answer changes a game result.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
komi case 6	`"invalid"`	`5`	Failed

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