In some starting positions, squares can remain occupied during castling that would be required to be vacant under classical rules. Another recommendation is to verbally announce the intent to castle before doing so. įIDE's recommended procedure for castling unambiguously is first to move the king outside the playing area next to its final square, then to move the rook to its final square, then to move the king to its final square. All the squares between the king's initial and final squares (including the final square), and all the squares between the castling rook's initial and final squares (including the final square), must be vacant except for the king and castling rook.No square from the king's initial square to its final square may be under attack by an enemy piece.The king and the castling rook must not have previously moved.The move is notated 0-0 as in classical chess.Ĭastling prerequisites are the same as in classical chess, namely:
After h-side castling ( kingside/short castling in classical chess), the king finishes on the g-file and the h-side rook finishes on the f-file.The move is notated 0-0-0 as in classical chess. After a-side castling ( queenside/long castling in classical chess), the king finishes on the c- file and the a-side rook finishes on the d-file.White has castled a-side (0-0-0) and Black has castled h-side (0-0). The first world championship officially sanctioned by FIDE, the FIDE World Fischer Random Chess Championship 2019, brought additional prominence to the variant. In 2008, FIDE added Chess960 to an appendix of the Laws of Chess. The result is 960 unique possible starting positions. Randomizing the main pieces had long been known as shuffle chess, but Fischer random chess introduces new rules for the initial random setup, "preserving the dynamic nature of the game by retaining bishops of opposite colours for each player and the right to castle for both sides". The random setup makes gaining an advantage through the memorization of openings impracticable players instead must rely more on their skill and creativity over the board. Fischer random chess employs the same board and pieces as classical chess, but the starting position of the pieces on the players' home ranks is randomized, following certain rules. Fischer announced this variation on June 19, 1996, in Buenos Aires, Argentina. Tournament games: from 10 min ( fast chess) to >6 hįischer random chess, also known as Chess960, is a variation of the game of chess invented by the former World Chess Champion Bobby Fischer. ~1 min + 1 min to determine starting position
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