Snaky

The quantity is the upper bound on Maker moves needed to win Snaky on the infinite square board. Fewer moves are better. Nándor Sieben’s finite $17\times17$ strategy, supplied by gotrevor, also works on the infinite board. The separate $15\times15$ result concerns board size.

OpenAI baseline: $21$ , released Oct 6, 2:58 PM PT.

These results are Claimed: their authors published them, and we have not checked them.

Bound	Evidence level	Author	Date	Proof scope
$20$	Claimed	Nándor Sieben (strategy) and gotrevor	Oct 7, 6:45 AM PT	Proof scope Strategy-checker formalization.

Relevant repos

gotrevor/snaky-15x15: The smaller finite board is a separate result.