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The Chess Variant Pages

This page is written by the game's inventor, Ted Larson Freeman.

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Ted Larson Freeman wrote on 2021-08-30 UTC

Thanks for the explanation of how ChessV works, Greg. I have rewritten the description of the rule for threefold and fivefold repetition to take into account the feedback below. I believe the way ChessV handles it will work, with just one thing to clarify. The move status in Two Move Chess is one of these:

  1. It is the beginning of a turn that is not a response move turn
  2. It is half way through a two move turn
  3. It is a response move turn

In ChessV, you might have to do something to ensure that otherwise identical board positions with these distinct possibilites for move status are not considered the same.

For simplicity, I would like to leave the 50 turn and 75 turn rules as they are. The 50 move rule in international chess considers 100 board positions, for example, and I think it would be unnecessarily confusing to have a "100 position rule" and a "150 position rule" in Two Move Chess. I agree that these rules will almost never actually be invoked in Two Move Chess.

I am also open to persuasion if this proves to be a stumbling block in ChessV.

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