Widukin

Practised 16 positions on The Fork
Practised 11 positions on Key Squares
Practised 10 positions on Overloaded Pieces
Practised 10 positions on Discovered Attacks
Practised 9 positions on 7th-Rank Rook Pawn
Practised 8 positions on The Skewer
Practised 8 positions on Opposition
Practised 8 positions on The Pin
Practised 7 positions on Interference
Practised 6 positions on Double Check
Practised 6 positions on Greek Gift
Practised 5 positions on Zwischenzug
Practised 4 positions on Zugzwang
Practised 2 positions on Knight & Bishop Mate

Practised 18 positions on Checkmate Patterns III
Practised 18 positions on Checkmate Patterns I
Practised 15 positions on Checkmate Patterns IV
Practised 9 positions on Knight & Bishop Mate
Practised 7 positions on Piece Checkmates II
Practised 4 positions on Piece Checkmates I