Practised 2 positions on Double Check
Practised 1 position on X-Ray
Practised 1 position on Checkmate Patterns IV
Practised 1 position on Checkmate Patterns I
Practised 1 position on Piece Checkmates II
Practised 1 position on Checkmate Patterns IV
Practised 1 position on Checkmate Patterns I
Practised 1 position on Piece Checkmates II