Practised 16 positions on The Fork
Practised 14 positions on Checkmate Patterns IV
Practised 11 positions on Key Squares
Practised 9 positions on Discovered Attacks
Practised 8 positions on Opposition
Practised 8 positions on The Pin
Practised 8 positions on The Skewer
Practised 6 positions on Double Check
Practised 4 positions on Zugzwang
Practised 3 positions on Greek Gift
Practised 3 positions on Overloaded Pieces
Practised 2 positions on Counter Check
Practised 2 positions on Interference
Practised 2 positions on X-Ray
Practised 2 positions on Piece Checkmates II
Practised 11 positions on Key Squares
Practised 9 positions on Discovered Attacks
Practised 8 positions on Opposition
Practised 8 positions on The Pin
Practised 8 positions on The Skewer
Practised 6 positions on Double Check
Practised 4 positions on Zugzwang
Practised 3 positions on Greek Gift
Practised 3 positions on Overloaded Pieces
Practised 2 positions on Counter Check
Practised 2 positions on Interference
Practised 2 positions on X-Ray
Practised 2 positions on Piece Checkmates II