[Event "SWE-ch"] [Site "Borlange"] [Date "2014.07.12"] [Round "1"] [White "Wiedenkeller, Michael"] [Black "Blomqvist, Erik"] [Result "0-1"] [ECO "A11"] [WhiteElo "2479"] [BlackElo "2496"] [Annotator "CB"] [PlyCount "82"] [EventDate "2014.07.12"] [EventType "tourn"] [EventRounds "9"] [EventCountry "SWE"] [EventCategory "10"] [SourceTitle "CBM 161 Extra"] [Source "ChessBase"] [SourceDate "2014.08.29"] [SourceVersion "1"] [SourceVersionDate "2014.08.29"] [SourceQuality "1"] 1. c4 c6 2. g3 d5 3. Nf3 Nf6 4. Bg2 dxc4 5. O-O Nbd7 6. Na3 Nb6 7. Qc2 Be6 $6 { Claiming that White pawn sacrifice is not correct. This move can be played according to chess computers, but sincerely what is Black's hope of own play here?} 8. Ng5 $1 {A concrete approach.} ({Simple development is also perfectly fine.} 8. b3 $1 cxb3 9. axb3 g6 10. Bb2 Bg7 11. Nc4 O-O 12. Na5 Qc7 13. e4 Rad8 14. d4 {with compensation.}) 8... Bg4 9. Nxc4 Bxe2 10. Ne5 Bh5 11. Re1 $1 { [#] Another excellent move. White is going directly to the throat. What is happening here? Black has a knight on b6, which Capablanca never liked. He has moved his bishop four times. For this white has sacrificed one pawn. In a position like this Black must search for unexpected tactics for White and be sure his next move don't lose on he spot.} e6 $2 {White of course knows that f7 is weak, so why did he not find Bf3? Well, my speculation is that he normal tendency is to calculate forced lines, but in order to crack a gm you need o include non-forcing moves in your search.} (11... h6 {This have been played by Potkin.} 12. Ne4 e6 {And now it is surprisingly difficult for white to prove an advantage.} 13. Nxf6+ (13. a4) (13. d4 Nxe4 14. Rxe4 Bd6) 13... gxf6 14. Bxc6+ bxc6 15. Qxc6+ Ke7 16. Qb7+ $11) (11... Nbd7 {A move played amongst others, Gajewski.} 12. d4 e6 13. Bf3 $1 Nxe5 14. Bxh5 Ng6 15. Rxe6+ Be7 16. Bxg6 hxg6 17. Re2 $14) 12. b3 $2 {This move postpone the hard work of hard calculation and in his case the chance doesn't return.} (12. Bf3 $1 {wins.} Bg6 13. Bxc6+ bxc6 14. Qxc6+ Nfd7 (14... Nbd7 15. Nxg6 hxg6 16. Nxf7 Kxf7 17. Qxe6# ) 15. Nexf7 Bxf7 16. Nxf7 {Grandelius-Perunovic 2011.} Kxf7 17. Qxe6#) 12... Be7 13. Bb2 Nbd7 14. d4 Nxe5 15. dxe5 Nd5 {[#]Black's position is solid now. With 2 knights on board they were both fighting for the d5-square.} 16. Ne4 Nb4 17. Qc3 Qd3 18. Nd6+ Bxd6 19. exd6 Qxc3 20. Bxc3 Nc2 21. Bxg7 $2 {The final mistake.} ({Perhaps both players missed:} 21. Re5 Nxa1 22. Rxh5 Nc2 23. Be4 Na3 24. Bxg7 Rg8 25. Bb2 Nb5 26. Bxh7 Rf8 27. Bg7 Nxd6 28. Bxf8 Kxf8 29. Bd3 { Gives White a position with some slight hopes.}) 21... Rg8 22. Bf6 Nxa1 23. Rxa1 Kd7 {The rest is as they say a matter of technique...} 24. Be7 a5 25. Rc1 a4 26. b4 a3 27. b5 Rgc8 28. Rb1 Ra7 29. bxc6+ bxc6 30. Kf1 Bg6 31. Rb4 c5 32. Rb6 c4 33. Ke1 Bc2 34. Bb7 Rc5 35. Ba6 Ba4 36. Rb8 Re5+ 37. Kf1 Rxa6 38. Rb7+ Kc8 39. Rc7+ Kb8 40. d7 Bxd7 41. Rxd7 Rd5 0-1your web browser and/or your host do not support iframes as required to display the chessboard; alternatively your wordpress theme might suppress the html iframe tag from articles or excerpts