Monochromatic chess d2 and f2, the white king can move from e1 only with castling and then g1–h2–g3–... so the pawn on g3 cannot be white. In Bichromatic chess, the opposite restrictions apply. A piece on a white square must move to a black square and vice versa. Hence pawns cannot capture (or advance two squares) and bishops cannot move. Also, castling and "en passant" are impossible, and queens behave like rooks. Monochromatic chess Monochromatic chess is a chess variant with unknown origin. The initial board position and all rules are the same as in regular chess, except that pieces that begin
Fast chess than 60 minutes. Rapid chess can be played with or without time increments for each move. In a game where time increments are used, a player can automatically gain, for instance, ten more seconds on the clock after each move. In a case where time increments are used, the total time per player for a 60-move game must be more than 10 minutes, but less than 60 minutes. For the FIDE World Rapid Championship, each player will have 15 minutes, plus 10 seconds additional time per move starting from move 1. The United States Chess Federation (USCF) quick chess rating