Chess puzzle (Crushing)
Opening: Ponziani_Opening, Ponziani_Opening_Other_variations
Moves: 1. e4 e5 2. Nf3 Nc6 3. c3 Bc5 4. d4 exd4 5. cxd4 Bb4+ 6. Nc3 d5 7. Bd3 Nge7 8.
O-O O-O 9. e5 f6 10. h3 fxe5 11. dxe5 Be6 12. Re1 Ba5 13. a3 Bb6 14. Na4 Nf5
15. Nxb6 axb6 16. b4 Nxb4 17. Ng5 Bc8 18. e6 Nxd3 19. Qxd3 Qf6 *
Position (FEN): r1b2rk1/1pp3pp/1p2Pq2/3p1nN1/8/P2Q3P/5PP1/R1B1R1K1 w - - 1 20
White to move.
Themes: Advanced Pawn, Pin Middlegame  
Puzzle rating: 1535
Best move: e7