FA-82949 / Go territory scoring / Member archive

A one-stone handicap places a stone · case 04

Handicap 1 (no komi, black first) puts a black stone on the board.

Member previewVariant 4 · 3 implementations · 8 checks per implementation

Case contract

Input [size, count]. Star line e = 2 (0-based) below 13x13 else 3; f = size-1-e; mid = size//2. Counts outside 2..9 give []. Even boards allow at most 4. Order: [e,f],[f,e],[f,f],[e,e]; counts 6-9 add [mid,e],[mid,f]; 8-9 add [e,mid],[f,mid]; odd counts from 5 add the centre last.

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
handicap placement case 0	`[[2, 4]]`	`[]`	Failed

MEMBER ARCHIVE

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