FA-83009 / Go territory scoring / Member archive

An empty SGF move value is rejected · case 04

B[] passes become invalid moves.

Member previewVariant 4 · 3 implementations · 8 checks per implementation

Case contract

Input [size, text]. "" is a pass; "tt" is also a pass on boards up to 19x19. Otherwise exactly two lower-case letters: first = column, second = row, both from the top-left. Return [row, col], "pass" or "invalid".

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
sgf point case 6	`"invalid"`	`"pass"`	Failed

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