Kevin Pacey wrote on Thu, Feb 18, 2016 09:49 PM 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.