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H. G. Muller wrote on Thu, Sep 21, 2023 07:59 PM UTC in reply to Bob Greenwade from 03:28 PM:

The Lion must actually make a back-and-forth step to null move. If there is no empty square next to it, it cannot null-move. So mabK is exactly right. But it can actually be 8 null moves, which is a bit problematic for the AI. In fact  if different pieces make a null move, it is still the same move. But the ID has no way to enter a turn pass anyway.

I am not sure [G-B] would already work. But it really should (transforming it to [mpF-mpF-F-B]), so eventually I will fix that. Every bracket case with incommensurate atoms has to be programmed separately, for how to expand it in K steps.


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