Got my answer from H. G. Muller on TalkChess.

hgm
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According to FIDE rules it would be a repetition. En-passant rights are only supposed to be present when there is an actual Pawn that can make such a capture.

This is different from castling rights; those are supposed to exist (and thus ...

Hi guys -

Q: A position is repeated 3 times (same castling rights each time), but the first time the position was arrived by a double pawn push (but no possible en-passant captures - either because there were no capturing pawns or because an ep-capture would be illegal...) - is this considered a ...

Hi guys -

Thanks for the confirmation/explanation.

I initially thought that the mask should be different for different bishop/rook positions... Now that I think about it, there is no reason for that to be the case. What should be unique (ignoring good collisions) is the hash of each possible ...

Hi -

I'm working on a chess engine with MagicBitBoard move generator. I have a question about BishopMask. I have seen that for this mask (as well as RookMask), we turn off the bits at the edge of the board. My question is, if we do that, bishops at opposite corners of the board will have the same ...