Comment by runarberg

I suspect the majority of these illegal moves are in blitz or bullet tournaments in game 12 of the third day, and the player touches one peace but moves another, or hits the clock with the hand that didn’t make the move, or hits the clock without making a move. I don‘t think any expert level chess player grabs a captured rook and places it on the board, or moves a light squared bishop to a dark square, unless they are hustling at the park, in which case (it can be argued) moves like this with a slight of hand is part of the game.