Touch-move rule the player touches his rook at the same time as touching the king, he must castle with that rook if it is legal to do so. If the player completes a two-square king move without touching a rook, the player must move the correct rook accordingly if castling on that side is legal. Otherwise, the move must be withdrawn and another king move made. When a pawn is moved to its eighth , once the player takes his hand off the pawn, a different move of the pawn can no longer be substituted. However, the move is not complete until
Losing Chess most widely played (main variant) is described in "Popular Chess Variants" by D. B. Pritchard. The rules are the same as those for standard chess, except for the following special rules: A player wins by losing all their pieces, or being stalemated. Apart from move repetition, draw by agreement, and the fifty-move rule, the game is also drawn when a win is impossible (for example, when the only pieces remaining are ). Because of the forced capture rule, Losing Chess games often involve long sequences of captures by one player. This means that a minor mistake can doom a game.