FA-82847 / Go territory scoring / Member archive

Dame bordered by both colours is credited to black · case 02

Neutral points between the two armies are added to black area and the reported margin is inflated.

Member previewVariant 2 · 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 1	`[17, 8, "B+9.0"]`	`[16, 8, "B+8.0"]`	Failed

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