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Interactive diagrams. Diagrams that interactively show piece moves.[All Comments] [Add Comment or Rating]
Greg Strong wrote on Wed, Apr 28, 2021 12:26 PM UTC in reply to H. G. Muller from 08:30 AM:

How about using a special separator for castling? We now have x for captures, and - (or nothing) for non-captures. We could adopt ~ for castling. So in the orthoChess setup Kd1 or K-d1 would be a normal King move to (empty) d1, but K~d1 would be Q-side O1 castling. K~h1 would be K-side O3 castling.

This makes a lot of sense to me.