Chess puzzle (Equality)
Moves: 1. d3 Nf6 2. Nf3 e6 3. g3 d5 4. c3 c5 5. Ne5 Nbd7 6. Qa4 Be7 7. Nf3 O-O 8. Qd1
b6 9. Bg2 Bb7 10. Bg5 h6 11. Bd2 Qc7 12. Bf4 e5 13. Bd2 e4 14. Bf4 Bd6 15. Bxd6
Qxd6 16. dxe4 Nxe4 17. Na3 Rae8 18. Nb5 Qf6 19. Bh3 Nxc3 20. Nxc3 Qxf3 *
Position (FEN): 4rrk1/pb1n1pp1/1p5p/2pp4/8/2N2qPB/PP2PP1P/R2QK2R w KQ - 0 21
White to move.
Themes: Defensive Move Middlegame  Castling
Puzzle rating: 2134
Best move: O-O