1
The Temporary Barrier
Black has just pushed a pawn two squares to block the long diagonal. White to move has a special resource available — and only on this move.
★★
2
The Pawn Race
Black has just pushed the b-pawn two squares, trying to slip past the white pawn. The white king is far too slow to catch it. Find the only move that decides the game for White.
★★
3
The Window That Opens for One Move
Black has just pushed a pawn two squares to dodge the mating threat on the g-file. There is an immediate reply that ends the game — but it is available only right now.
★★
4
The Barricade That Doesn't Last
Black has just pushed a pawn two squares to shut the long diagonal and shelter the king in the corner. There is a resource that tears the wall down at once and leads to mate. White to play.
★★