ピタゴラシチョウ (Pitagora Shicho)

By あんどう (@igo9x9)

Pre-place white and black guide stones on a 13x13 Go board so that an automatic ladder (shicho) pursuit steers the fleeing white stones around X obstacles and into the goal. Click or tap empty intersections to cycle between white, black, and empty, then press Start to run the chain reaction.

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