[Event "Stevenson Memorial Bognor Regis"] [Site "Bognor Regis"] [Date "1959.04.??"] [Round "9"] [White "Matchett, Harry G T"] [Black "May, Alan K"] [Result "0-1"] [ECO "D75"] [Annotator "Tactical Analysis 5.1 (5s)"] [PlyCount "80"] [EventDate "1959.04.??"] [EventType "swiss"] [EventRounds "10"] [EventCountry "ENG"] [SourceTitle "EXT 1999"] [Source "ChessBase"] [SourceDate "1998.11.16"] [SourceVersion "1"] [SourceVersionDate "1998.11.16"] [SourceQuality "1"] {[%evp 13,80,34,68,65,143,160,184,188,282,280,290,270,327,294,323,286,337,340, 419,400,486,387,397,22,25,-40,-47,-54,-44,-115,-131,-315,-146,-119,-132,-125, -107,-122,-118,-105,-98,-142,-100,-89,-85,-159,-50,-55,-50,-107,7,-250,-234, -233,-215,-239,-227,-425,-12,-12,-11,-11,-11,-74,-67,-65,-54,-755,-730]} 1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 d5 5. cxd5 Nxd5 6. Nf3 O-O 7. O-O c5 8. e4 { [#] D75: Fianchetto Grünfeld: Main Line with 7...c5.} Nb4 $146 (8... Nf6 $1 $14) ({Predecessor:} 8... Nf6 9. e5 Nd5 10. Qe2 cxd4 11. Nxd4 Nc6 12. Nxc6 bxc6 13. Nc3 Nxc3 14. bxc3 {1/2-1/2 (14) Tarasov,V-Aronson,L Moscow 1957}) 9. d5 $1 $16 (9. dxc5 $2 Qxd1 10. Rxd1 Nc2 $19) (9. a3 $6 N4c6 $11) 9... e6 {[%CAl Re6d5]} 10. a3 {White is clearly better.} N4a6 (10... Qa5 $142 11. Be3 Bxb2) 11. Nc3 $18 exd5 12. exd5 (12. Nxd5 Nc6 $16) 12... Nd7 13. Bg5 Nf6 14. Qd2 Nc7 {[%CAl Rc7d5]} 15. Rad1 Bd7 16. Rfe1 Re8 17. Rxe8+ Ncxe8 {[%CAl Bc7e8,Be8d6, Bd6e4][%mdl 32]} 18. Qf4 (18. d6 $18) 18... Qb6 $11 19. Rd2 (19. Qc1 $11) 19... Nh5 $1 $15 20. Qe3 {[%CAl Od5d6] And now d6! would win.} Nd6 21. Qe2 (21. Re2 $15) 21... Re8 $17 22. Qf1 $2 (22. Qd3 $17 {was the only defense.}) 22... Bxc3 (22... h6 $19 23. Be3 Nf5) 23. bxc3 Ne4 {[%csl LRc3,LRd2]} 24. Rc2 Nxg5 25. Nxg5 Qb3 {[%csl LRa3,LRc2]} 26. Qc1 Bf5 $36 {[%mdl 2048] White is under strong pressure.} (26... h6 $6 27. Ne4 $11) 27. Rd2 h6 28. Nf3 Nf6 29. Nh4 (29. c4 $142) 29... Qb1 {Black is much more active.} (29... Be4 $17 30. d6 Rd8) 30. Qxb1 $15 Bxb1 31. d6 ({White should play} 31. Bf1 $15) 31... Be4 (31... Re1+ 32. Bf1 $14) (31... g5 $1 $17 32. Nf3 Bf5) 32. Bxe4 $4 {[%mdl 8192]} ({Much worse is} 32. d7 Rd8 33. f4 Bxg2 34. Kxg2 Rxd7 35. Rxd7 Nxd7 $17) (32. Re2 $1 $11) 32... Nxe4 $11 {[%mdl 4096] Endgame KRN-KRN} 33. d7 Rd8 34. Rd5 b6 $1 ({ Inferior is} 34... Nf6 35. Rxc5 Rxd7 36. Nf3 $11) 35. Nf3 $2 (35. c4) 35... Nf6 $2 (35... Nxc3 $19 36. Rd3 Nb5) 36. Rd6 Ne4 ({Much less strong is} 36... Nxd7 37. Ne5 $1 $16) 37. Rd3 f6 {Inhibits Ne5. White should prevent ...Kf7.} 38. Re3 {[#]} (38. Nh4 $11) 38... Nd6 $1 $17 39. Re7 {aiming for Nh4.} Kf8 40. Rh7 { [%mdl 8192]} (40. Re6 $15 Rxd7 41. Rxf6+ Kg7 42. Re6) 40... Nf7 {Weighted Error Value: White=0.86/Black=0.50} 0-1