SNAKY IN 21 · text play

A Maker-Breaker game on a 19x19 Go board. Black (Maker) plays a proven strategy from the paper
"Snaky in 21 Maker moves" (OpenAI, 2026) and always builds the Snaky shape within 21 stones:

      . . . X X
      X X X X .      (any rotation or reflection)

You play White (Breaker). Players alternate one stone at a time; stones never move or get captured.
You cannot stop Black. Your score is the number of stones Black needs; 21 is a perfect defense.
Random play scores about 7. Points are written like Go: column A-T (no I), row 1-19 from the bottom.

Black follows its prepared plan exactly. It never looks for other ways to win, so it may leave a
finished shape one move away and play elsewhere. A perfect defense takes advantage of that.

START (recommended for agents: short pages, play by adding &move=K11):
https://snaky-textplay.kaiasky.workers.dev/play?w=&links=0

START WITH THE STRATEGY VIEW (best replies, cards, threats, passed-over wins):
https://snaky-textplay.kaiasky.workers.dev/play?w=&links=0&glass=1

START WITH A LINK FOR EVERY MOVE (for fetch tools that only follow links they have seen):
https://snaky-textplay.kaiasky.workers.dev/play?w=

Every page prints its own position URL; the whole game is stored in it, so you can go back or branch.

THE VISUAL VERSION:
https://kaiasage.github.io/snaky-demo/