FA-83147 / Go territory scoring / Member archive

Clicking an empty point clears all dead marks · case 02

A misclick during counting resets the dead-stone agreement.

Member previewVariant 2 · 3 implementations · 8 checks per implementation

Case contract

Input [board, dead_points, row, col]. Clicking a stone toggles its whole orthogonally connected chain: if the clicked stone is currently marked, unmark the chain, otherwise mark it. Clicking an empty point changes nothing. Return the sorted distinct dead 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
dead marks case 4	`[]`	`[[2, 2]]`	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.