FA-83082 / Go territory scoring / Member archive
A liberty shared by two stones of a chain hides the atari · case 02
Chains whose only liberty touches two of their stones are not reported.
Case contract
Input a board. Report every chain with exactly one distinct liberty as [colour, lib_row, lib_col, chain_size], sorted ascending.
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 fixtureThis sample comes from the broken implementation of a controlled reproducer.
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| atari case 7 | [] | [["W", 1, 1, 8]] | Failed |
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This record includes three runnable implementations, regression fixtures, execution results, and source hashes.
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