Opposite bishops
Opposite-colored bishops draw far more than material suggests: the defender blockades on one color. Learn the fortress, and the separation rule that lets two pawns break it.
19 positions to play
Guard e6, But From the Right Square
Black to play and draw
Connected Passers Do Beat an Opposite-Coloured Bishop
White to play and win
Bf8, Then Give the Bishop for a Pawn
Black to play and draw
March at the Piece That Holds the Pawn
White to play and win
Same Pawns, Swapped Defenders, No Win
White to play and draw
The Knight's Pawn Saves the Draw
White to play and draw
The Opposite-Colored Bishops Fortress
Black to play and draw
Opposite Bishops: Two Pawns Win
White to play and win
Opposite Bishops: The Defensive Draw
White to play and draw
Beat the Wrong-Diagonal Bishop
White to play and win
Rook and Knight Pawns: Wait on the Long Diagonal
Black to play and draw
Race to the Fortress
Black to play and draw
The Cage
White to play and win
One File Apart: The King Blockade Holds
Black to play and draw
When the Attacker Owns the Corner
White to play and win
Central and Rook Pawn: Deny b7
Black to play and draw
The Overextended Knight Pawn
Black to play and draw
Knight Pawn Kept Back: Two Threats at Once
White to play and win
Outflanking with a- and e-Pawns
White to play and win
Learn the theory
The written method behind these positions: what to aim for, the exact moves, and the traps that lose a won ending.