[Event "US Junior Championship"] [Site "Memphis, TN"] [Date "1976.06.??"] [Round "5"] [White "Diesen"] [Black "DeFirmian"] [Result "1-0"] [ECO "B91"] [WhiteElo "2467"] [BlackElo "2649"] [Annotator "Fritz 9 (30s)"] [PlyCount "63"] [EventDate "1976.??.??"] {B91: Sicilian Najdorf: 6 g3} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. g3 g6 7. Bg2 Bg7 8. O-O O-O 9. h3 Nc6 10. Nde2 Bd7 11. Nd5 Nxd5 12. exd5 Ne5 {last book move} 13. Kh2 Rc8 14. Rb1 (14. c3 Bb5 $11) 14... Qa5 15. a3 Qc5 (15... Nc4 16. c3 $15) 16. c3 Bb5 (16... Bf5 $5 17. Ra1 Qb6 $11) 17. Be3 $14 { White threatens to win material: Be3xc5} Qc7 18. Bd4 Bd3 {Black threatens to win material: Bd3xb1} 19. Ra1 Rfe8 20. Re1 Bf5 21. g4 {White threatens to win material: g4xf5} Bd7 22. Ng3 (22. b3 $142 g5 23. Qd2 $14) 22... Qc4 $2 (22... Nc4 $142 {and Black could well hope to play on} 23. Bxg7 Kxg7 $14) 23. b3 $18 Qd3 24. f4 Rxc3 $2 (24... Qxd1 $142 $5 25. Raxd1 f6 $18) 25. Bxc3 Qxc3 26. Rc1 Qb2 (26... Qa5 $18) 27. fxe5 Bxe5 28. Qf3 (28. Rc7 {keeps an even firmer grip} Rd8 29. Qc1 Qxb3 30. Rxe5 dxe5 $18) 28... f5 $2 (28... Qxa3 29. Rf1 f6 $18) 29. gxf5 Rf8 30. Kh1 Bxf5 (30... Qxa3 {hardly improves anything} 31. Qe3 Bxf5 32. Rc7 $18) 31. Rf1 Qd4 (31... Qxa3 {cannot change destiny} 32. Rc7 $18 (32. Nxf5 $143 Rxf5 33. Qg4 Kg7 $18)) 32. Nxf5 (32. Nxf5 Rxf5 33. Qe4 Rxf1+ 34. Rxf1 $18) 1-0