Chess puzzle (Checkmate)
Opening: Old_Indian_Defense, Old_Indian_Defense_Czech_Variation
Moves: 1. d4 c6 2. c4 d6 3. Nc3 Nf6 4. e4 Bg4 5. Nf3 Nbd7 6. Be2 Qc7 7. O-O e5 8. Be3
h6 9. Qd2 g5 10. Rfd1 Be7 11. Rac1 Nh5 12. d5 c5 13. Nb5 Qb6 14. b4 a6 15. bxc5
dxc5 16. d6 axb5 17. dxe7 Ndf6 18. Bxc5 Qxc5 19. Qd8+ Rxd8 *
Position (FEN): 3rk2r/1p2Pp2/5n1p/1pq1p1pn/2P1P1b1/5N2/P3BPPP/2RR2K1 w k - 0 20
White to move.
Themes: Advanced Pawn Middlegame Mate in 1 Promotion
Puzzle rating: 1780
Best move: exd8=Q#