FA-82853 / Go territory scoring / Member archive

Komi is added to black instead of compensating white · case 03

Close games flip winner; the half-point margin moves the wrong way.

Member previewVariant 3 · 3 implementations · 8 checks per implementation

Case contract

Input [board, komi_tenths]. Area = own stones + empty regions whose orthogonal border touches only that colour. Return [black_area, white_area, result] where result is "B+x.y" / "W+x.y" after subtracting komi from black, or "Draw".

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
area score case 0	`[1, 1, "W+0.5"]`	`[1, 1, "B+0.5"]`	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.