Chess Puzzle #EteOy — Advanced, Black to move, middlegame

Position

White: king e1; queen e2; rooks a1/h1; bishops c1/c4; knight f3; pawns a5/c3/f2/g4/h3. Black: king c8; queen c7; rooks d8/h8; bishop c5; knight f6; pawns a6/b7/e6/f7/g5/h6. White is ahead by 2 points of material. Black to move.

Solution (2 moves)

1. Opponent setup: O-O — king e1→g1. Now Black to move.
2. Best move: Qg3+ — queen c7→g3, gives check. Opponent replies Kh1 (king g1→h1).
3. Best move: Qxh3+ — queen g3→h3, captures pawn, gives check.

Tactical themes

advantage, kingside attack, middlegame, pin, short. The key move Qxh3+ captures with check, forcing a response.

Position data

FEN: 2kr3r/1pq2p2/p3pn1p/P1b3p1/2B3P1/2P2N1P/4QP2/R1B1K2R w KQ - 0 20

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