[Event "It"] [Site "Kemeri (Latvia)"] [Round "0"] [White "Flohr"] [Black "Apsheniek"] [Result "1/2-1/2"] [ECO "D55"] [Opening "QGD: 6.Nf3"] {The respective opportunities} 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 c6 7. Qc2 Nbd7 8. cxd5 exd5 9. Bd3 Re8 10. O-O Nf8 11. Ne5 $2 { This was customary twenty years ago, but it is now established that the minority attack is White'sbestline} (11. Rab1) 11... Ng4 $2 {This leads to the removal of two pairs of minor pieces, and helps Black considerably, enabling him to maneuver with freedom. A waiting game, on the other hand, would have been dangerous for Black, since then his opponent, in addition to his Queenside prospects, could choose to make the Kingside his hunting ground, leading off with Pf4} 12. Bxe7 Qxe7 13. Nxg4 Bxg4 14. a3 { This is the prelude to Pb4-5} 14... Rad8 { This move and the next move mark the beginning of a Kingside attack} 15. Rfe1 { A valuable defensive move, which frees the square f1 and takes an option on e4} 15... Rd6 16. Ne2 Rh6 17. Ng3 Bc8 18. b4 {Now that White has attended to the defence of his Kingside position, he resumes his advance of the Queenside. He threatens to open a file at once by playing ... Pb5} 18... a6 19. Rab1 Qc7 { Black intends to bring his Knight via d7-f6-e4 (the furthest available square on the half-open file!)} (19... Qh4 20. Nf1 {achives nothing}) 20. a4 Nd7 21. Rec1 Nf6 22. Nf1 Ne4 23. b5 {Both players according to plan} 23... axb5 24. axb5 Bd7 25. Qa2 Qd8 26. bxc6 Bxc6 27. Bb5 Rg6 28. Bxc6 bxc6 {The minority attack is at an end, and Black's weak c-pawn is the result. Indeed the whole Queenside is completely under White's control. Nevertheless, as the sequel will show, there is no cause for Black to despair. Hisoperations in the half-open e-file and on the Kingside in general are beginning to bear fruit in the form of a menacing attack} 29. Rb2 h5 30. Rbc2 { Putting the weakness under fire} 30... Qd7 { Protecting the c-pawn but also casting an eye towards the White King} 31. Kh1 h4 {Threatening ... Ph3 and envisaging possible Rook sacrifices on g2} 32. h3 Qf5 33. Nh2 Qg5 34. Ng4 f5 35. f4 Qh5 36. Ne5 Rg3 { Black's c-pawn is doomed, but he threatens to win the White e-pawn in return} 37. Re1 (37. Rxc6 Rxe3 38. Qxd5+ Kh7 {Black has threats of ... Re2 and ... Nf2} ) 37... Rb8 38. Kh2 (38. Rxc6 Rxe3 39. Rxe3 Qd1+ 40. Kh2 Rb1 41. Qa8+ Kh7 42. Rh6+ gxh6 43. Qa7+ Kh8 44. Qa8+ {Draw by perpetual check}) 38... Kh7 39. Nxc6 ( 39. Rxc6 Qe8 40. Rc2 {Black would have full compensation for the pawn since his pieces are more active} (40. Qxd5 Rb2 $1)) 39... Qg6 $1 40. Rg1 (40. Nxb8 Rxh3+ 41. gxh3 Qg3+ 42. Kh1 Qxe1+ 43. Kg2 Qg3+ {Black gains at least a pawn}) 40... Rxe3 41. Nxb8 Qg3+ 42. Kh1 Qxf4 43. Rd1 Ng3+ 44. Kg1 1/2-1/2