Chess960 position 661

The back rank is R N B B K R N Q. The king starts on e1, the rooks on a1 and f1, the bishops on c1 and d1, the queen on h1.

White has twenty legal first moves, the same as in ordinary chess.

Castling short, the king goes from e1 to g1 and the rook stays on f1.

Castling long, the king goes from e1 to c1 and the rook goes from a1 to d1.

One thing about castling here surprises people: the kingside rook already stands on f1, so castling short moves only the king.

A rook sits in the corner on a1, so bringing it into the game is usually a reason to castle early.

Every rule of chess applies here unchanged apart from castling, which the rules page explains in full. To play this exact arrangement against the computer, open position 661 on Play CPU. To train tactics on positions like it, use the Chess960 puzzle trainer.