[Event "Candidates 2002"] [Site "Memphis"] [Date "2002.01.06"] [Round "4"] [White "Senn, Randall"] [Black "Piekortz, Roland"] [Result "1-0"] [ECO "B08"] [WhiteElo "1978"] [BlackElo "1860"] [Annotator "Fritz 9 (30s)"] [PlyCount "106"] [EventDate "2002.??.??"] {B08: Pirc Defence: Classical System} 1. e4 g6 2. Bc4 d6 3. Nf3 Bg7 4. d4 Nf6 5. Nc3 Nc6 6. d5 Nb8 7. h3 {last book move} O-O 8. Be3 c6 {Black has a cramped position} 9. O-O b5 $11 10. Bb3 b4 11. Ne2 Nxe4 12. dxc6 Qc7 (12... Bxb2 13. Bd5 Nf6 14. c7 Qxc7 15. Bxa8 Bxa1 16. Qxa1 $15) (12... Nxc6 $2 {doesn't work because of} 13. Bd5 Bxb2 14. Rb1 $18) 13. Ned4 (13. Nfd4 e6 $11 (13... Nxc6 $2 {is nothing because of} 14. Nxc6 Bxb2 15. Nxb4 $18)) 13... Ba6 $15 ({Less advisable is} 13... Nxc6 14. Nxc6 Bxb2 15. Nxb4 $16) 14. Re1 e5 {Black threatens to win material: e5xd4} (14... Nxc6 15. Nxc6 Bxb2 16. Bd4 Bxa1 17. Nxe7+ Qxe7 18. Bxa1 $18) 15. Ne2 Nxc6 16. a3 bxa3 17. Rxa3 {White has new hanging pawns: b2+c2. White has an active position} Bb7 18. Bd5 {A comfortable square for the white bishop} Nf6 19. Nc3 a6 {White has a very active position} (19... Nxd5 20. Nxd5 Qd8 21. c4 $15) 20. Bg5 h6 21. Bxf6 Bxf6 {Black has the pair of bishops} 22. Ne4 {White threatens to win material: Ne4xf6} Be7 23. c3 { Controls b4+d4} (23. Nc3 Nb4 24. Bxb7 Qxb7 $15) 23... Kg7 24. Qa4 (24. Ng3 f5 $15) 24... f5 25. Ned2 Bf6 26. Nc4 e4 {Black threatens to win material: e4xf3} (26... Rab8 27. Nfd2 $17) 27. Nfd2 (27. Rb3 Nd8 28. Nb6 Bxd5 29. Nxd5 Qc6 30. Qxc6 Nxc6 31. Rb7+ Rf7 $15) 27... Ne5 28. Bxb7 Qxb7 29. Nxe5 Bxe5 30. Nc4 Qb5 ( 30... Rfd8 31. Rb3 Qd7 32. Qa5 $15) 31. Rea1 $11 Qc5 32. Rb3 Rf7 33. Rb6 { Exerts pressure on the backward pawn. Attacks the isolani on a6} (33. Nxe5 $5 dxe5 34. Qa5 $11) 33... e3 34. fxe3 f4 $4 {forfeits the advantage} (34... Rc7 $142 35. b3 Bxc3 36. Rxd6 Bxa1 37. Qxa1+ Kh7 $19) 35. Rc6 $16 Qd5 36. Nxe5 Qxe5 37. exf4 Rxf4 38. Rc7+ Rf7 $4 {the final mistake, not that it matters anymore} (38... Kf6 39. Qd7 Re4 40. Qf7+ Kg5 $18) 39. Rxf7+ $18 Kxf7 40. Qd7+ (40. Qb3+ $142 {and White can celebrate victory} Ke8 41. Qg8+ Kd7 42. Qxa8 $18) 40... Kg8 $16 41. Rd1 Re8 (41... a5 $5 $16) 42. Qxd6 $18 Qe3+ 43. Kh1 Qe6 44. Qxe6+ (44. b4 $5 Kh7 $18) 44... Rxe6 $16 45. Rd7 (45. b4 Rc6 $16) 45... Rb6 (45... a5 46. Rb7 $16) 46. b4 Rc6 47. Ra7 (47. Rd3 $5 $16) 47... Rxc3 48. Rxa6 {White has a new passed pawn: b4} Kf7 49. b5 Rb3 50. b6 {He broke from his leash} Kf6 51. b7+ Kg5 52. Ra5+ Kh4 {White has a decisive advantage} 53. Kh2 Rb2 $4 (53... g5 $142 $14 {the only rescuing move}) 1-0