[Event "Candidates 2007"] [Site "Memphis, TN"] [Date "2007.01.07"] [Round "4"] [White "Harbert, Carlos"] [Black "Maclin, Philip"] [Result "1/2-1/2"] [ECO "B06"] [WhiteElo "1899"] [BlackElo "1472"] [Annotator "Fritz 9 (30s)"] [PlyCount "52"] [EventDate "2007.??.??"] {B06: Modern Defence} 1. d4 d6 2. Nf3 g6 3. e4 Bg7 4. Bg5 h6 5. Bh4 Nf6 6. Nbd2 {last book move} O-O 7. Be2 c5 8. c3 (8. dxc5 dxc5 9. c3 Nh5 $11) 8... cxd4 ( 8... g5 9. Bg3 g4 10. Nh4 cxd4 11. cxd4 $15) 9. Nxd4 Nc6 10. Qb3 {White has an active position} (10. O-O Bd7 $11) 10... Na5 {Black threatens to win material: Na5xb3} (10... d5 11. Nxc6 bxc6 12. exd5 Qxd5 13. Qxd5 Nxd5 14. Bc4 $15) 11. Qc2 b6 (11... Nc6 12. O-O $11) 12. b4 {White threatens to win material: b4xa5} Nb7 13. f4 a5 14. Rb1 {Black has a cramped position} Bd7 (14... axb4 15. cxb4 Bd7 16. O-O $11) 15. Bf3 (15. e5 $5 {is interesting} Nh5 16. Bxh5 gxh5 17. b5 $14) 15... axb4 16. Rxb4 e5 17. fxe5 dxe5 18. Nb5 {A valuable piece} Nc5 19. O-O {White castles and improves king safety} Be6 20. a4 Nd3 {Black threatens to win material: Nd3xb4} (20... Qd7 21. Bxf6 Bxf6 22. Nc4 $15) 21. Rbb1 $11 { Black has an active position} g5 {Black threatens to win material: g5xh4} 22. Bg3 Ng4 (22... Nf4 23. c4 $11) 23. Bxg4 $14 Bxg4 {Black has the pair of bishops } 24. Nc4 Nf4 25. Bxf4 (25. Rfe1 Qd3 26. Qxd3 Nxd3 $14) 25... exf4 26. h3 (26. Rb4 $5 $11 {has some apparent merit}) 26... Be6 $15 (26... Be6 27. Rfd1 Qb8 $15 ) 1/2-1/2