FA-82984 / Go territory scoring / Member archive

Lower-case vertices and "pass" are rejected · case 04

Engines sending d4 or pass get "invalid".

Member previewVariant 4 · 3 implementations · 8 checks per implementation

Case contract

Input [size, text]. Case-insensitive, surrounding blanks ignored; "pass" -> "pass". Column letters A..Z skipping I; row numbers count from 1 at the bottom. Return [row_from_top, col] 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
vertex case 5	`"invalid"`	`"pass"`	Failed

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