[Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "Cambridge-Springs"]
[Black "Hauptvarianten, r"]
[Result "*"]
[ECO "D52"]
[PlyCount "28"]
[SourceDate "2006.09.08"]
[TimeControl "240+2"]

{404MB, book.ctg} 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3 c6 6. Nf3 Qa5
7. cxd5 {1. Hauptvariante} (7. Nd2 {2. Hauptvariante} Bb4 8. Qc2 O-O (8... Ne4
9. Ndxe4 dxe4 10. Bh4 O-O 11. Be2 e5 12. O-O exd4 13. exd4 g5 $1 14. Bg3 f5 15.
f4 Bxc3 16. bxc3 g4 $11 {(Kiselev-Sergeev 1992)}) 9. Be2 e5 10. O-O exd4 11.
Nb3 Qb6 12. exd4 (12. Nxd4 Bxc3 13. bxc3 dxc4 14. Bxf6 Nxf6 15. Bxc4 $11 {
vdSterren-Yusupov 1994)}) 12... dxc4 13. Bxc4 Qc7 14. Nd2 Ng4 $11 {.}) (7. Qc2
{. ?}) (7. Qb3 {?}) (7. a3 {?}) 7... Nxd5 (7... exd5 8. Bd3 Ne4 9. O-O Nxg5 10.
Nxg5 Nf6 11. Re1 h6 12. Nf3 $14) 8. Qd2 Bb4 9. Rc1 O-O 10. Bd3 h6 11. Bh4 (11.
Bf4 Nxf4 12. exf4 Nf6 13. O-O c5 14. dxc5 Bxc5 15. a3 Be7 16. Ne5 Rd8 17. Qe2
g6 18. Rcd1 Qc7 19. Bb1 Bd7 20. Rd3 Be8 21. Rg3 Bf8 $11 {(Persson-Yerevan 1996)
}) 11... Re8 (11... e5 12. a3 Bxc3 13. bxc3 Re8 14. c4 Qxd2+ 15. Nxd2 Ne7 {!}
16. Bxe7 Rxe7 17. d5 $14 {(Beliavsky-Oll 1996)}) 12. O-O e5 13. Qc2 exd4 14.
Nxd5 Qxd5 $11 *
