Chess Puzzle #Y86mh — Advanced, Black to move, middlegame

Position

White: king c1; queen b4; rooks d1/h1; bishop d3; knight f3; pawns b2/c2/f2/g2/h2. Black: king e8; queen a2; rooks a8/h8; bishop g7; knight g8; pawns a6/e7/f7/g6/h7. Material is balanced. Black to move.

Solution (4 moves)

1. Opponent setup: Bc4 — bishop d3→c4. Now Black to move.
2. Best move: Bh6+ — bishop g7→h6, gives check. Opponent replies Ng5 (knight f3→g5).
3. Best move: Bxg5+ — bishop h6→g5, captures knight, gives check. Opponent replies f4 (pawn f2→f4).
4. Best move: Bxf4+ — bishop g5→f4, captures pawn, gives check. Opponent replies Rd2 (rook d1→d2).
5. Best move: Qa1# — queen a2→a1, delivers checkmate.

Tactical themes

mate, mate in 4, middlegame, pin, very long. The combination ends with Qa1# delivering checkmate.

Position data

FEN: r3k1nr/4ppbp/p5p1/8/1Q6/3B1N2/qPP2PPP/2KR3R w kq - 1 16

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