[Event "Hoogovens"] [Site "Beverwijk"] [Date "1946.01.08"] [Round "4"] [White "Cortlever, Nicolaas"] [Black "Stoltz, Gosta"] [Result "0-1"] [ECO "D33"] [Annotator "MJDonnelly"] [SetUp "1"] [FEN "3r2k1/pp1r1p2/7p/3n4/3R2p1/4BqP1/PP1Q1P1P/3R2K1 w - - 0 28"] [PlyCount "84"] [EventDate "1946.01.05"] [EventType "tourn"] [EventRounds "9"] [EventCountry "NED"] [Source "ChessBase"] [SourceVersion "2"] [SourceVersionDate "1999.07.01"] [SourceQuality "1"] {[%evp 0,84,0,-110,-103,-146,-146,-140,-160,-168,-176,-164,-171,-174,-193,-200,-157,-167,-156,-165,-164,-160,-153,-150,-150,-146,-164,-171,-160,-156,-156,-156,-156,-190,-198,-199,-194,-229,-245,-253,-250,-251,-192,-209,-196,-243,-229,-227,-234,-244,-225,-267,-267,-311,-327,-414,-265,-288,-263,-263,-263,-268,-263,-276,-263,-288,-263,-263,-263,-263,-281,-281,-281,-281,-281,-298,-294,-294,-297,-295,-297,-303,-303,-303,-303,-303,-531] [#]} 28. Bxh6 {White grabs a pawn, but this leads to multiple exchanges, to move from a middle-game to an ending.} (28. Qd3 {keeps the game about even since Black is then unable to take advantage of the arrangement of pieces on the d-file. For example,} Nxe3 29. Qxe3 Qxd1+ 30. Rxd1 Rxd1+ 31. Kg2 {when White's queen is active.}) 28... Nf4 29. Bxf4 Rxd4 30. Qxd4 Qxd1+ 31. Qxd1 Rxd1+ 32. Kg2 {White has a bishop plus pawn for a rook and no pawn weaknesses. At first glance White might seem to be able to defend the position quite easily. For instance, play a3, so all the pawns are on squares defendable by the bishop, placed say on e5 or f6. The bishop may also defend the f2 pawn which gives White the chance to play h3 and potentially generate a pawn majority on the king's side. However, it's Black to move and he neatly starts the process of harrasing the bishop..} Re1 {the threat is Re2 controlling e5 and attacking the b2-pawn.} 33. Bd2 Re2 34. Bc3 {White is fine for the moment but Black is free to move the king forward on the white squares which White cannot dispute.} a6 {Black removes a pawn from possible tempo gaining attack by the bishop and underlines the bishop is restricted to defensive and not offensive options. Black can instead try returning material by. for example, sacrificing the rook at c3 leaving White's queen's side pawns vulnerable to the Black king. However, this idea cannot be rushed as the following representative lines show and the idea can go wrong. For example,} (34... Rc2 35. a3 Kh7 (35... Rxc3 {is worst as Black is a long way from capturing the c-pawn and White is winning after} 36. bxc3 Kg7 37. c4 Kf6 38. f3 Kf5 39. fxg4+ Kxg4 40. h3+ Kf5 41. Kf3) 36. Bd4 Kg6 37. Bc3 Kf5 38. Bg7 Ke4 39. Bc3 Rxc3 (39... Kd3 40. a4 Rxc3 {this only draws.} 41. bxc3 Kxc3 42. f3 ({certainly not} 42. h4 gxh3+ 43. Kxh3 Kb4 44. Kg4 Kxa4 45. Kf5 {and Black's pawns are much faster to queen.}) 42... f5 43. h3 $11) 40. bxc3 Kd3 41. f3 f5 ({poor is} 41... Kxc3 42. fxg4 $18) 42. h3 gxh3+ 43. Kxh3 Kxc3 44. g4 $11) 35. a4 Kf8 36. b4 a5 37. bxa5 Ke8 38. Bd4 Ra2 39. h4 Rxa4 {stronger than} (39... gxh3+ 40. Kxh3 Rxa4 {when} 41. Bb6 {gives White some chances of defending succesfully. For instance,} Kd7 42. f3 Rb4 43. g4 Rxb6 44. axb6 Kc6 45. g5 Kxb6 46. f4 Kc6 47. Kg4 b5 48. f5 b4 49. g6 fxg6 50. fxg6 b3 51. g7 b2 52. g8=Q b1=Q $11) 40. Bb6 Ra2 41. Kf1 Ke7 42. Ke1 Ke6 43. Kd1 f5 44. Kc1 f4 {A good move. White temporarily offers a pawn to weaken White's king's side structure.} 45. gxf4 ({If White declines and defends passively then Black continues to advance the king generating mating threats. If White advances the h-pawn it becomes detached from the rest of White's posiotn and is soon lost.when Black can then return attention to the f2 pawn. Possible variations are} 45. Kb1 Re2 46. Kc1 Kd5 47. Kd1 Ra2 48. h5 fxg3 49. fxg3 Rh2 (49... Ke4 50. h6 Kd3 51. Kc1 Rh2 52. h7 Rxh7 53. Ba7 Ke2 54. Bc5 (54. Bd4 Kf3 55. Be5 Rh3 56. Kc2 Rxg3 $19) 54... Rc7 $19)) 45... Kf5 46. Kb1 Re2 47. h5 Re4 48. Kc2 Rxf4 49. Kc3 Re4 50. Bd4 Kg5 51. Kc4 Kxh5 52. Kc5 Kg6 (52... Rxd4 {is here useless and throws away the win. The game can be draw via} 53. Kxd4 Kh4 54. Ke4 Kh3 55. Kf4 Kg2 56. Kxg4 Kxf2 57. Kf5 Ke3 58. Ke5 Kd3 59. Kd5 Kc3 60. Kc5 Kb3 61. Kb5 Kc3 62. Kb6 Kb4) 53. Bc3 Re6 54. Kb5 Kf7 55. Bd4 Ke7 56. Ba7 Rf6 57. Bd4 Rf5+ 58. Kb6 Kd7 59. Be3 (59. Kxb7 {leaves the king cut off from the action on the king's side when Black can effectively sacrifice the rook on f2.} Rxa5 60. Kb6 Ra2 61. Kc5 Ke6 62. Kc4 Kf5 63. Kd3 Kf4 64. Be3+ Kf3 65. Bb6 Rxf2 $19) 59... Kc8 60. Bd4 Kb8 61. Be3 Rf6+ 62. Kc5 Kc7 63. Kc4 Kc6 64. Bb6 Rf3 65. Ba7 b5+ {A fine idea which shuts the bishop fatally out of the game if the pawn is accepted.} 66. Kb4 (66. axb6 Kb7 {now White cannot guard f2 and Black soon queens via} 67. Kd4 Rxf2 68. Ke4 g3 69. Ke3 Rf7 70. Ke2 g2) 66... Rf4+ 67. Kb3 Kb7 68. Bb6 Ka6 69. Kc3 Rf6 (69... Rf6 {leaves White with no useful moves. Either f2 or a5 is lost when the b- or the g-pawn advances to win easily.} 70. Bd8 (70. Kd3 Rxb6 71. axb6 Kxb6 72. Ke4 (72. Kc3 Kc5 $19) 72... b4 $19) (70. Bd4 Rf3+ 71. Kb4 (71. Kd2 Kxa5) 71... Rf4 72. Kc5 Rxd4 73. Kxd4 Kxa5 $19) 70... Rxf2 $19) 0-1