[Event "Amsterdam"] [Site "?"] [Round "0"] [White "Trifunovic"] [Black "Van Scheltinga"] [Result "1-0"] [ECO "C49"] [Opening "Four Knights: 4.Bb5 Bb4"] {The Bishop pair employed to weaken the enemy pawn position} 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 d6 7. Bg5 Bxc3 8. bxc3 Qe7 9. Re1 { Since the position is half close, and since, moreover, the White pawns are somewhat weakned by the doubling on the c-file, Black has some compensation for White's Bishop pair.} 9... Nd8 {First of all, Black must get rid of the troublesome pin on his Nf6 by dislodging the Bg5} 10. d4 Ne6 11. Bc1 { This strange looking move is the best. on c1 the Bishop is well placed, not exposed to exchange, and free to operage not only from c1-h6 but also on the a3-f8 diagonal} 11... c5 { Black means to force White to clear up the central situation} 12. Bf1 (12. dxe5 dxe5 13. Nxe5 $2 Nc7 $19) (12. d5 Nc7 13. Bf1 b5 $132 { counterplay on the Queenside}) 12... Rd8 (12... cxd4 13. cxd4 Qc7 14. Bb2 { giving good chances, even if it meant losing a pawn}) 13. d5 Nf8 { Hoping to bring the Knight into active play at g6.} (13... Nc7 {more flexible}) 14. c4 Ne8 15. g3 {White's plan is clear: he intends after necessary preparation, to force the advance of Pf4 and so to open lines for his Bishop} 15... f5 $2 {Playing White's game} (15... Ng6 16. h4 Bg4 17. Qd3 Bxf3 18. Qxf3) 16. exf5 Bxf5 17. Nh4 $1 { Thus in any case White gets an open diaganol for his Bishop} 17... Qd7 18. f4 { Always the same aim: open the position} 18... exf4 19. Bxf4 Ng6 { Giving White the chance of a favourable liquidation} (19... Bg4 20. Qd2) 20. Nxf5 Qxf5 21. Bd3 Qf6 22. Bxg6 $1 {A characteristic turn; White relinquishes the Bishop pair but obtains in return either a weakening of the hostile pawn structure or else an inroad into the seventh rank} 22... hxg6 (22... Qxg6 23. Re7 {one advantage transformed into another}) 23. Rb1 g5 (23... b6 24. Re6 Qd4+ 25. Qxd4 cxd4 26. Rd1 Rac8 27. Rxd4 $18) 24. Be3 Rd7 25. Qg4 Rf7 26. Rf1 Qg6 27. Rxf7 Qxf7 28. Bxg5 $18 {With a soun d extra pawn, a good Bishop and some advantage in development White now stands to win} 28... Nc7 29. Bf4 Qf6 30. Qd1 b6 31. Qd3 Re8 32. Rf1 b5 33. cxb5 Qd4+ 34. Qxd4 cxd4 35. Bxd6 Nxb5 36. Bb4 a5 37. Bxa5 Ra8 38. Bb4 Rxa2 39. d6 Ra8 40. d7 Nc7 41. Rf8+ $18 1-0