NQAin

Practised 11 positions on Key Squares
Practised 10 positions on Deflection
Practised 10 positions on Underpromotion
Practised 8 positions on Opposition
Practised 7 positions on Interference
Practised 6 positions on Checkmate Patterns II
Practised 6 positions on Greek Gift
Practised 5 positions on Counter Check
Practised 5 positions on Clearance
Practised 5 positions on Undermining
Practised 3 positions on 7th-Rank Rook Pawn

Practised 10 positions on Overloaded Pieces
Practised 7 positions on X-Ray
Practised 6 positions on Double Check

Practised 5 positions on Desperado
Practised 4 positions on Zugzwang

Practised 10 positions on Discovered Attacks
Practised 8 positions on The Pin
Practised 8 positions on The Skewer