Also the en passant hack. It allows a player to make illegal pawn moves.
The 3 fold repetition hack, your opponent ends the game as a draw even though you were winning.
The pawn promotion hack, your opponent gets more than 1 queen.
And probably worst of all is the rating hack. Your opponent hacks chess.com and makes your rating go down after you lose.
Now a no move hack. Aside from the issue of you not being able to move while the opponent is in motion of theirs. They have a hack now that won’t let you move.