Black to move and checkmate in 11. Can you find it without computer assistance?
3bk2r/1N1n1pp1/2Q1pn2/1P5p/P2P4/1B1qP2P/4rPP1/R2N2KR b k – 0 1
Calculation challenge
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Black to move and checkmate in 11. Can you find it without computer assistance?
3bk2r/1N1n1pp1/2Q1pn2/1P5p/P2P4/1B1qP2P/4rPP1/R2N2KR b k – 0 1
1… Re1+ 2. Kh2 Ng4+ 3. hxg4 Rxh1+ 4. Kg3 (4. Kxh1 Qf1+ 5. Kh2 hxg4+ 6. Kg3
Rh3+ 7. Kxg4 f5+ 8. Kxh3 Qh1+ 9. Kg3 Qh4+ 10. Kf3 Qg4#) 4… Bh4+ 5. Kf4 g5+ 6.
Kf3 hxg4+ 7. Kxg4 Qf5#
Two moves were easy. The continuation after that was pretty difficult.
1… Re1+ 2. Kh2 Ng4+ 3. hxg4 Rxh1+! (3…hxg4+ is tempting but there is no mate) 4. Kxh1
( 4. Kg3 Bh4+ 5. Kf4 g5+ 6. Kf3 hxg4 7. Kxg4 Qf5#)
4… Qf1+ 5. Kh2 hxg4+ 6. Kg3 Bh4+, and now:
A) 7. Kxg4 Qe2+ 8. f3/Qf3 (8. Kf4 g5 9. Ke4 f5#) f5+ 9. Kh3 (9. Kf4 g5#) Bf2+ 10. Qh5 Rxh5#
B) 7. Kf4 g5+ 8. Kxg4 Qe2+ 9. f3/Qf3 f5+ as above.
C) 7. Kh2 Bxf2#