FA-83264 / Go territory scoring / Member archive

Points exactly at the reach distance are left neutral · case 04

The estimate shrinks every moyo by one ring.

Member previewVariant 4 · 3 implementations · 8 checks per implementation

Case contract

Input [board, reach]. Each empty point belongs to the colour of the strictly nearest stones by Manhattan distance, provided that distance <= reach; ties between colours or no stone in reach leave it neutral. Return [black_points, white_points].

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
estimate case 0	`[0, 0]`	`[3, 5]`	Failed

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

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