[Event "Mar del Plata"] [Site "Mar del Plata"] [Round "10"] [White "Najdorf"] [Black "Sanguinetti"] [Result "1-0"] [ECO "D53"] [Opening "QGD: 4.Bg5 Be7 5.e3"] {Invasion on the c-file} 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 Nbd7 6. Nf3 O-O 7. Rc1 c6 8. Bd3 dxc4 9. Bxc4 Nd5 10. Bxe7 Qxe7 11. O-O Nxc3 12. Rxc3 e5 13. Qb1 e4 14. Nd2 Nf6 15. b4 {The promptness with which White can start his minority attack results from his 13. Qb1. The question is really whether Black, in these circumstances, should have played 13. ... Pe4. We do not propose to argue this point here, as it belongs properly in to the domain of the openings} 15... a6 16. Rfc1 Bg4 (16... Bd7 17. -- Rac8) 17. a4 Rad8 { intending ... Rd6 for a Kingside attack} (17... Rac8) 18. h3 Bh5 $2 { the Bishop can not be spared from the Queenside} (18... Bc8) 19. b5 axb5 20. axb5 c5 {With this move, which is based on the unprotected position of the White Knight, Black avoids being left with a weak c-pawn, but he jumps out of the frying pan into the fire} 21. Nb3 $1 {Black has to open the c-file himself} 21... cxd4 (21... b6 22. dxc5 bxc5 23. Nxc5 Qxc5 24. Bxf7+) 22. Nxd4 Bg6 (22... Rc8 23. Bxf7+) (22... Nd5 23. Bxd5 Rxd5 24. Rc7 Rd7 25. Rxd7 Qxd7 26. Qxe4) 23. Bb3 Ne8 (23... Nd5 24. Rc5) 24. Qa2 Rd7 25. Qa5 Qd8 26. b6 $1 Rd6 27. Rc8 Qe7 ( 27... Qxb6 28. Qa8) 28. Qc5 { full mastery of the open file than this there can not be!} 28... Rd7 29. Ba4 Qxc5 (29... Rd6 30. Bxe8 Rxe8 31. Qxd6 {overloaded Queen}) 30. R1xc5 Re7 31. Rd8 h6 (31... Nf6 32. Rcc8) 32. Rcc8 f6 33. Rb8 1-0