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Circular Chess. Chess on a round board. (Cells: 64) (Recognized!)[All Comments] [Add Comment or Rating]
Kevin Pacey wrote on 2016-02-18 UTC
H.G. wrote:

"I don't think KRK is won on a board without corners. The bare King can just flee away from the stong King along the ring. There is no way a Rook can slow it down, if there are only four Rings: you keep attacking the Rook until it leaves the radius where you wanted to go."

I now believe you are correct, H.G. Somehow one night I had imagined a zugzwang could always be arranged even if the superior K was more than 1 file away from a cut off (by the R, to a single rank) lone K, but I was clearly up too late, and since then I neglected to check my conclusion.