11 Castling

11.1 Tutorial

Castling is the only occasion on which two pieces are moved at the same time. The king moves two squares to its right or left. Then the rook leaps over the king and occupies the square right next to it.
The rules for castling
  • castling is only possible if neither the king nor the rook has moved
  • there must not be any pieces between the king and the rook
  • the king may not be in check
  • the square the king goes to and any intervening squares may not be under attack
  • however, there is nothing to prevent castling if the rook is under attack

11.2 Exercises

Move directly on the board to input a solution. Either click first on the start square and then on the target square. Or click on the piece, hold on to it, move it tot he target square and let go of it. The button ‘Left arrow’ takes back the move.
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Castling brings the king to safety and the rook comes into play. Take care not to move the king or the rook unnecessarily in the opening since you then lose the right to castle.