Chess Puzzle #lOyrM — Expert, Black to move, middlegame

Position

White: king g1; queen b7; rook a1; knight f3; pawns a4/c3/e6/g2/h3. Black: king a5; queen c5; rook d4; bishop f5; pawns a7/b5/c7/f7/g6. Material is balanced. Black to move.

Solution (4 moves)

1. Opponent setup: axb5+ — pawn a4→b5, captures pawn, gives check. Now Black to move.
2. Best move: Ra4+ — rook d4→a4, gives check. Opponent replies Kh2 (king g1→h2).
3. Best move: Qd6+ — queen c5→d6, gives check. Opponent replies g3 (pawn g2→g3).
4. Best move: Rxa1 — rook a4→a1, captures rook. Opponent replies Qxa7+ (queen b7→a7, captures pawn, gives check).
5. Best move: Kxb5 — king a5→b5, captures pawn.

Tactical themes

discovered attack, discovered check, endgame, equality, very long. The key move is Ra4+.

Position data

FEN: 8/pQp2p2/4P1p1/kpq2b2/P2r4/2P2N1P/6P1/R5K1 w - - 0 31

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