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Spiral Chess. The royal pieces slide along a spiral trajectory.[All Comments] [Add Comment or Rating]

💡📝H. G. Muller wrote on Sat, Jun 5, 2021 06:33 PM UTC:

This page is ready for publication

Greg Strong wrote on Sun, Jun 6, 2021 01:01 AM UTC:

I'm not seeing anything explicit about whether a king sprials clockwise or counter-clockwise (or both.) And does black spiral the opposite way? (Based on your description of king vs king endgames, I'm thinking not, although it seems to me that should be the case - unless, of course, both can spiral in both directions.)

💡📝H. G. Muller wrote on Sun, Jun 6, 2021 07:37 AM UTC in reply to Greg Strong from 01:01 AM:

Each King can move along all eight congruent spirals. I had expected that to be clear from calling it a 'fully symmetric' spiral mover (and the earlier explanation that spiral moves are oblique and have 8 realizations). I have added a sentence now to make that more explicit.

💡📝H. G. Muller wrote on Fri, May 26, 2023 08:10 PM UTC:

By scripting a special move generator on this page I could include an Interactive Diagram that can play this variant.