[Event "Plovdiv 1977"]  [White "Ivan Radulov"]  [Black "Bozidar Ivanovic"]  [Result "1-0"]  [ECO "B66"]  [Annotator "ATH"]  [PlyCount "65"]  [EventDate "1977.??.??"]  [SourceTitle "StarBase 4.56"]  [SourceDate "2004.11.04"]  [SourceVersion "1"]  [SourceVersionDate "2004.11.04"]  [SourceQuality "2"]   1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 e6 7. Qd2 a6 8.  O-O-O h6 9. Be3 Bd7 10. f3 Qc7 (10... Nxd4 $5 11. Bxd4 b5) 11. Kb1 Be7 12. g4  Ne5 ({The immediate} 12... b5 {is better}) 13. h4 (13. Rg1 $5) 13... b5 (13...  d5 $5) 14. Bd3 (14. a3 $1 $16) 14... Rb8 (14... Qb7 $5) 15. g5 (15. Rdg1 $5 $16  ) 15... Ng8 $6 (15... Nh5 16. gxh6 gxh6 17. a3 $16) 16. f4 Nc4 $6 (16... Nxd3)  17. Bxc4 (17. Qf2 $5) 17... bxc4 18. Qg2 d5 $6 (18... e5 19. Nf3 Qb7 20. Bc1  exf4 21. Nd5 $18 {loses more slowly}) 19. Ka1 $2 {Throwing away the bulk of  White's advantage} (19. f5 Bb4 20. Ncb5 $1 Qe5 (20... axb5 $2 21. gxh6 Nxh6 22.  Qxg7 $18) 21. fxe6 fxe6 22. exd5 Bxb5 (22... axb5 $2 23. dxe6 Bxe6 24. Qc6+ $18  ) 23. gxh6 $18) 19... dxe4 20. Bc1 $6 {Throwing away a little more of White's  advantage} (20. gxh6 Rxh6 21. f5 $18) 20... hxg5 ({Somewhat better is} 20... e3  21. Qe4 $18 (21. Bxe3 $2 Qb7 22. Qxb7 Rxb7 23. Bd2 $14)) 21. fxg5 Qb7 (21...  Qb6 {puts up more resistance}) 22. h5 (22. Qg3 $1) 22... Bb4 ({It really  doesn't matter but} 22... e5 23. Nde2 e3 24. Qg3 $18 {is better}) 23. Nxe4 $1 (  23. Qxe4 $2 Bxc3 24. Qxb7 Rxb7 25. bxc3 $14) 23... e5 24. Qe2 $1 f5 (24... c3 {  is better}) 25. gxf6 $2 (25. Nc5 $1 Bxc5 26. Qxe5+ {is a bone-crusher while  the text tosses away most of White's advantage (but not enough to endanger the  victory)}) 25... Nxf6 26. Nxf6+ $2 {This begins to endanger the victory} (26.  Rh4 $18) 26... gxf6 27. Qxc4 $6 (27. Rhg1 $18) 27... Bd2 $2 (27... exd4 28.  Qxd4 Qc6 29. Qd3 Kd8 30. Rh4 $18 {White is still up two pawn equivalents but  it was seven}) 28. Qd3 Bh6 $2 (28... Bxc1 29. Qg6+ Kd8 30. Qxf6+ Kc7 31. Qxe5+  $18 {prolongs the game a bit}) 29. Qg6+ Ke7 30. Rhf1 (30. b3 $1 {ends the game  a bit faster}) 30... Qb6 31. Nf5+ ({Again} 31. b3 $1) 31... Bxf5 32. Rxf5 Bf8  $2 (32... Rhd8 {only prolongs the agony}) 33. Rxe5+ $1 1-0