Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Four_Knights_Variation
Moves: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Bc4 Bc5 7. Be3 Bxd4 8.
Bxd4 Nxd4 9. Qxd4 O-O 10. O-O-O a6 11. f4 b5 12. Bd3 Bb7 13. Rhg1 d5 14. e5 Nd7
15. g4 f6 16. exf6 Nxf6 17. f5 exf5 18. gxf5 Qd6 19. Rg2 b4 *
Position (FEN): r4rk1/1b4pp/p2q1n2/3p1P2/1p1Q4/2NB4/PPP3RP/2KR4 w - - 0 20
White to move.
Themes: Defensive Move Middlegame  
Puzzle rating: 2102
Best move: Rdg1