Chess960, also called Fischer Random Chess, was invented by former World Champion Bobby Fischer in 1996. The rules are identical to standard chess with one key difference: the back rank pieces are shuffled randomly at the start.
The 960 Possible Positions
The name comes from the 960 possible starting positions. The bishops must be on opposite colors, the king must be between the two rooks (for castling to work), and the queens and knights can be in any remaining squares.
Why Play Chess960?
Chess960 levels the playing field by eliminating memorized opening theory. Every game starts in a unique position, so players must rely on fundamental chess understanding rather than prepared lines. Many top grandmasters (including Magnus Carlsen) love Chess960 for this reason.
Castling in Chess960
Castling works the same way conceptually — the king and rook end up in the same squares as in standard chess (g1/h1 for kingside, c1/a1 for queenside) — but the pieces might need to pass each other to get there. The key rule: both squares the king passes through must be safe.
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