[Event "ol"] [Site "ol"] [Round "0"] [White "Prins"] [Black "Kotov"] [Result "1-0"] [ECO "A53"] [Opening "Old Indian: Ukrainian"] 1. d4 Nf6 2. c4 d6 3. Nc3 e5 4. dxe5 dxe5 5. Qxd8+ Kxd8 6. Bg5 Be7 7. Nf3 Nbd7 8. Bh4 {A multi-purpose move. White clears g5 for occupation by a Knight, and at the same time prepares to plant the Bishop on g3, attacking the e-pawn. In itself this attack is nothing unusual, but the presence of the Bishop on g3 has an ulterior significance. The structure of the position will sooner or later require Black to play ... Pc6, and the ideal post for his King would typically be on c7, after which he could complete his development. However, it is clear that the existence of a White Bishop on g3 would defeat Black's idea. As a result the Black King will be relegated to staying in the centre, with all the dangers that implies} 8... c6 9. O-O-O (9. Bg3 Bd6) 9... Ng4 (9... Kc7 10. Bg3 Bd6 (10... Ng4 11. h3) 11. c5 $1 Nxc5 12. Nxe5) 10. Bg3 f6 {In this way Black tries to build a barrier against the enemy Bishop while solidly protecting the e-pawn} 11. Nh4 Nh6 12. e4 Bb4 13. Be2 $1 {This is logical. Since White means to take advantage of the insecurity of Black's King in the centre, he doesn't shrink from doubling of his c-pawn, the exchange would open more lines against Black's King} 13... Ke7 14. f4 $1 { The indicated means of freeing the Bishop} 14... exf4 15. Bxf4 g5 (15... Nf7 16. Nf5+) (15... Ne5 {An exchange on h6 would ease White's game}) 16. Be3 Ne5 17. Nf3 Nhg4 18. Bg1 Be6 19. Nd4 $3 Bxc3 (19... Nxc4 20. Nxe6 Kxe6 21. Bxc4+) ( 19... Bxc4 20. Nf5+ Ke6 (20... Kf7 21. h3 Bxc3 22. Nd6+ Ke7 23. Nxc4 $18 { winning a piece}) (20... Kf8 21. h3 Bxc3 22. Bc5+ Kg8 23. Bxc4+ Nxc4 24. Rd7 { These variations make it clear that the Black King is exposed to all sorts of dangers in the middle, in spite of the exchange ofQueen}) 21. h3 Bxc3 22. Rd6+ Kf7 23. Bxc4+ Nxc4 24. Rd7+ Ke8 25. Re7+ Kd8 26. bxc3 $16 {White dominates}) 20. bxc3 Nh6 (20... Bxc4 21. Nf5+ Ke6 22. Rd6+ Kf7 23. Bxc4+ Nxc4 24. Rd7+) 21. Nxe6 Kxe6 22. c5 Rhd8 23. Bd4 {Obviously White avoids further liquidation. His one aim now is to keep the pieces on the board; otherwise his attack would fizzle out} 23... Nhf7 24. Rhf1 Ke7 25. Rf2 Rf8 26. Bh5 $1 Nh8 (26... -- 27. Bxf7 Rxf7 28. Bxe5 fxe5 29. Rxf7+ Kxf7 30. Rd7+ $16) 27. Bxe5 fxe5 28. Rf5 $1 { Forcing a further exchange} 28... Rxf5 29. exf5 Rf8 30. g4 b6 (30... Nf7 31. Bxf7 Rxf7 32. Rd6) 31. Rd6 Rf6 32. Rxf6 Kxf6 33. Kd2 $2 (33. cxb6) 33... Ng6 $2 (33... bxc5 34. Kd3 Ng6 35. fxg6 hxg6 36. Bxg6 $11) 34. fxg6 hxg6 35. cxb6 $1 axb6 36. c4 gxh5 (36... c5 37. Bxg6 Kxg6 38. Kd3 $18) 37. c5 $1 b5 38. gxh5 g4 39. Ke3 Kg5 40. Ke4 Kxh5 41. Kxe5 Kh4 42. Kf6 $1 {The winning idea. Before going after the c-pawn White must get rid of the Black g-pawn or else win a tempo} 42... Kh5 (42... Kh3 43. Kg5 $18) 43. a3 Kh6 44. Ke6 Kh5 45. Kd6 Kh4 46. Kxc6 Kh3 47. Kxb5 Kxh2 48. c6 g3 49. c7 g2 50. c8=Q g1=Q 51. Qh8+ Kg2 52. Qg8+ $18 1-0