List Of Illegal Moves In Chess
Castling after having earlier moved your king.
Moving a pawn two spaces forward from any line but the second.
Flipping the board around while your opponent isn’t looking.
Failing to declare a check.
Capturing your opponent’s piece with a piece that is pinned.
Capturing your opponent with a piece that is unregistered.
Promoting to a piece of the opposite color.
Hollowing out a rook and using it as a crack pipe.
Sharpening a bishop and stabbing your opponent in the left (or right) eye.
Pawnography.
Check fraud.
Losing your tournament, but then later stealing the trophy from your opponent.
Touching a piece and then moving a different piece.
Murder.