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1 piece
The King can move just one square at a time in any direction. It should be defended at all times by the other pieces as once checkmated the game is lost.♛
1 piece
The most powerful piece on the board, the Queen can move any number of squares in straight lines or on the diagonal until obstructed by another piece.♜
2 pieces
After the Queen the Rook is the next most powerful piece on the board. It can move any number of squares in a straight line until obstructed by another piece.