Boden's mate is lesson 1 of 9 in Mating patterns I, a checkmate course suited to players rated around 700 (beginners). Two bishops on criss-crossing diagonals mate a king hemmed in by its own pieces, typically after queenside castling. It has 5 interactive exercises: 5 calculated lines from real positions. You play every move on a board and get feedback straight away. The lesson is free.
What you practise
White to move: mate in one. (5 positions)
Worked examples
White to move: mate in one. 1.Bf6#. Boden's mate: the bishop on f6 gave mate, and the bishop on c4 covered the other diagonal. Checkmate.
White to move: mate in one. 1.Bc6#. Boden's mate: the bishop on c6 gave mate, and the bishop on c7 covered the other diagonal. Checkmate.