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

Position

White: king g1; queen d1; rooks a1/f1; bishops c4/e3; knight e4; pawns a2/b2/c2/d4/f2/g2. Black: king e8; queen d8; rooks a8/h8; bishop h2; knights d7/h5; pawns a7/b7/c6/e6/f7/g6/g7. Black is ahead by 1 point of material. Black to move.

Solution (4 moves)

1. Opponent setup: Kxh2 — king g1→h2, captures bishop. Now Black to move.
2. Best move: Qh4+ — queen d8→h4, gives check. Opponent replies Kg1 (king h2→g1).
3. Best move: Qh1+ — queen h4→h1, gives check. Opponent replies Kxh1 (king g1→h1, captures queen).
4. Best move: Ng3+ — knight h5→g3, gives check. Opponent replies Kg1 (king h1→g1).
5. Best move: Rh1# — rook h8→h1, delivers checkmate.

Tactical themes

attraction, double check, fork, mate, mate in 4, middlegame, sacrifice, very long. The combination ends with Rh1# delivering checkmate.

Position data

FEN: r2qk2r/pp1n1pp1/2p1p1p1/7n/2BPN3/4B3/PPP2PPb/R2Q1RK1 w kq - 0 13

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