[Event "ch-Schachbundesliga 2020"] [Site "Karlsruhe GER"] [Date "2020.09.18"] [Round "4.2"] [White "Fressinet, L."] [Black "Mamedyarov, S."] [Result "0-1"] [ECO "D85"] [WhiteElo "2635"] [BlackElo "2764"] [PlyCount "84"] [EventDate "2020.09.16"] [EventType "team"] [EventRounds "7"] [EventCountry "GER"] [SourceTitle "TWIC 1350"] [Source "Mark Crowther"] [SourceDate "2020.09.21"] [SourceVersion "1"] [SourceVersionDate "2020.09.21"] [SourceQuality "2"] [WhiteTeam "SV Werder Bremen"] [BlackTeam "SC Viernheim"] 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Nf3 c5 8. Be3 {This is a very fashionable line} Qa5 9. Qd2 O-O 10. Rc1 cxd4 11. cxd4 Qxd2+ 12. Bxd2 {Plenty of play remains in the queenless game} Bd7 {[#]} ({ Relevant:} 12... Bg4 13. Be3 Nc6 14. d5 Bxf3 15. gxf3 Nd4 16. Bh3 f5 17. Rc7 Nxf3+ 18. Ke2 Nd4+ 19. Bxd4 Bxd4 20. exf5 gxf5 21. Rg1+ Kh8 22. Rxe7 Rae8 23. Re6 Rxe6+ 24. dxe6 Rf6 25. Kd3 Bxf2 26. Rf1 Bc5 27. Bxf5 Kg7 28. Ke4 Rh6 29. h3 Rh4+ 30. Kd5 b6 31. Bg4 h5 32. Rf7+ Kg6 33. Bf5+ Kg5 34. Be4 Rxh3 35. e7 Bxe7 36. Rxe7 Ra3 37. Ke5 Rxa2 38. Rg7+ Kh4 39. Kf4 Kh3 40. Rg1 b5 41. Rh1+ Rh2 42. Rb1 {Carlsen,M (2863)-Ding,L (2791) chess24.com INT 2020 1/2-1/2 (64)}) 13. Bc4 $146 ({Predecessor:} 13. Bd3 e6 14. Rc7 Bc6 15. Ke2 a5 16. Bf4 Na6 17. Bxa6 Rxa6 18. Ke3 f6 19. g4 Rb6 20. Rd1 Re8 21. g5 f5 22. Be5 Bf8 23. exf5 exf5 24. Kf4 Bd5 25. Rd2 a4 26. Ne1 Rb4 27. Kg3 Rb1 28. Ng2 a3 29. Ne3 Bf7 30. Rdc2 Be7 31. h4 Rg1+ 32. Kf3 Rb1 33. Kg3 Rg1+ 34. Kf3 Rb1 {1/2-1/2 (34) Mchedlishvili,M (2618)-Howell,D (2693) Reykjavik 2015}) 13... Nc6 14. d5 Nd4 15. Nxd4 Bxd4 16. Ke2 Rfc8 17. Bd3 e6 18. Be3 Bxe3 19. Kxe3 exd5 20. exd5 Kf8 {Black has the chances with the queenside majority and the easy blockade of the now non-threatening d-pawn} 21. Rhd1 Ba4 22. Rxc8+ {White is happy to simpliy and for a long time keeps the position level but it is White that must be careful as the queenside majority gives Black an easier to play game} Rxc8 23. Rb1 b6 24. Rb4 Bd7 25. Rc4 Ke7 {the king goes to d6 to negate the d-pawn and from now on White must be careful} 26. Rxc8 Bxc8 27. Kd4 Kd6 {[#]The blockade is set. Advancing the queenside majority should produce a useful passer soon enough} 28. h4 Bd7 29. a3 h6 30. Be2 b5 31. Bd3 a6 32. Bc2 Be8 33. f4 {White now commits his kingside pawns and unduces Black to put all the kingside pawns on light squares} Bd7 34. g3 {Possibly unnecessary} (34. Bd1 {is equal} f6 35. Be2 $11) 34... Bg4 35. Be4 Bd1 36. Bg2 f5 (36... h5 $17) 37. Bh1 (37. Kd3 Kc5 { the king cannot advance without allowing a clearance sacrifice to clear the long diagonal and free Bg2} (37... a5 38. Kd4 b4 39. axb4 axb4 40. h5 Bxh5 41. Kc4 b3 42. Kxb3 Kc5 43. Kc3 $15 {White has drawing chances}) 38. d6 $1 Kxd6 39. Kd4 $1 $44 {The extra P does not win} a5 40. Bd5 b4 {This logical winning try only just fails} 41. axb4 axb4 42. Bf7 {Putting all the kingside pawn on light squares comes back to haunt Black} Ke7 43. Bxg6 Bc2 44. Bh5 b3 45. Kc3 Kd6 46. Bf7 Kc5 47. Bxb3 Bxb3 48. Kxb3 Kd4 {infiltration is now or never} (48... h5 49. Kc3 $11) 49. h5 $1 {is a key defensive move} Ke3 50. Kc4 {The pawn eating race is on. Things look slightly worrisome for White a long line earns the draw} Kf3 51. Kd5 Kxg3 52. Ke5 Kg4 53. Kf6 Kxf4 54. Kg6 {this highlights the importance of 49.h5} Kg4 55. Kxh6 f4 56. Kg6 f3 57. h6 $11) 37... h5 {The kingside is completely fixed and Black can start zugzwang play} 38. Bg2 Bc2 $1 39. Bf1 $2 $19 {Simply drops the d-pawn} (39. Bf3 {should draw} Be4 40. Bd1 $1 {The right way to give up the d-pawn} (40. Be2 Bxd5 $19) (40. Bxe4 $2 {the pawn ending loses without a fight} fxe4 41. Kxe4 a5 $19 {is easily winning in normal fashion with the queenside pawns creating a decoy passer etc}) 40... Bxd5 41. a4 {The Bd1 supports this key advance} b4 (41... bxa4 42. Bxa4 Bc6 43. Bb3 Be8 $11 {Stockfish10 claim dead equal but a human would be worried}) 42. a5 $1 b3 43. Kc3 Kc5 44. Be2 b2 45. Kxb2 Bc4 46. Bf3 (46. Bxc4 $2 Kxc4 $19) 46... Kb4 47. Bc6 Bf7 48. Kc2 Kxa5 {The passed a-pawn is still not enough to win-only an engine has a chance to figure this out} 49. Kc3 Kb6 50. Ba4 Kc5 51. Bd1 a5 52. Bc2 Be8 53. Bb3 a4 54. Bc4 a3 55. Ba2 Bc6 56. Bf7 Bd5 57. Bxg6 a2 {the a-pawn is only strong enough to be a decoy} 58. Kb2 Kd4 59. Bxh5 {the h-pawn assures the draw} Ke3 60. Bg6 Kf2 61. h5 Kxg3 62. h6 Bg8 63. h7 a1=Q+ 64. Kxa1 Bxh7 65. Bxh7 Kxf4 $11) 39... Be4 40. a4 bxa4 41. Kc3 a3 42. Bxa6 Bxd5 0-1
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