Practised 18 positions on Checkmate Patterns I
Practised 10 positions on Discovered Attacks
Practised 7 positions on X-Ray
Practised 5 positions on Undermining
Practised 5 positions on The Skewer
Practised 7 positions on X-Ray
Practised 5 positions on Undermining
Practised 5 positions on The Skewer