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Parimarjan Negi vs Evgeny Postny
Politiken Cup (2009), Helsingor DEN, rd 8, Jul-24
Caro-Kann Defense: Classical Variation. Main lines (B18)  ·  1/2-1/2

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
Jul-27-09
Premium Chessgames Member
  tamar: Missed win for Negi?

Negi plays 54 a4 but Postny escapes into the tablebase draw Q and b pawn versus Q

After 54 b5 f4 55 b6 Nc5 56 Kb4 Nd7 57 b7 f3 58 Kc3 f2 59 Nd2 the knight gets back in time, and the a pawn will win.

Apr-07-21
Premium Chessgames Member
  g15713: Knight with a pair of connected passed pawns versus Knight with a passed pawn ending was a lot trickier to analyze than was expected. This game was picked for the informative queen ending not a routine <just kidding> knight ending!

E. 1.0
Black to move at 46


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Syzygy says it is a tablebase draw
'https://syzygy-tables.info/?fen=8/8...

Game continued:

46. Nxh6 f5 47. Nf7 Ne4 48. Ne5 Kd5 49. Nf3 Nc5+
50. Kc3 Ke4 51. Nd2+ Ke3 52. Nc4+

E. 1.1
Black to move at 52


click for larger view

Syzygy says it is a tablebase draw after 52...Ke4 while 52...Ke2 loses
'https://syzygy-tables.info/?fen=8/8...

Game continued:

52...Ke2? 53. b4! (Ne5 also wins) Nd7

E. 1.2
White to move at 54


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Syzygy says White is winning with 54. a4 or b5 or Nd6
'https://syzygy-tables.info/?fen=8/3...

Game continued:

54. a4 f4 55. a5 f3

E. 1.3
White to move at 56


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Syzygy says White is winning with 56. Nd2! f2 57. Ne4! while 56. a6 only draws
'https://syzygy-tables.info/?fen=8/3...

Game continued:

56. a6? f2 57. Nd2

E. 1.4
Black to move at 57


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Syzygy says Black is drawing with 57...Nf6! while 57...Ke3 loses
'https://syzygy-tables.info/?fen=8/3...

57...Ke3?

E. 1.5
White to move at 58


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Syzygy says White is winning with 58. b5 or Nf1+ while 56. a7 only draws
'https://syzygy-tables.info/?fen=8/3...

Game continued:

58. a7? Nb6 59. Nc4+ Ke2 (not 59...Nxc4 60. a8=Q f1=Q 61. Qe8+ Kf2
62. Qf7+ Ke1 63. Qxf1+ Kxf1 64. Kxc4 wins)

60. Nxb6 f1=Q 61. a8=Q Qf6+ 62. Kc4 Qxb6

Leading to a drawing Queen plus knight pawn on the 4th rank versus Queen ending - see next post

Apr-08-21
Premium Chessgames Member
  g15713: <"With a b-pawn or g-pawn, the situation is different as there is a new drawing zone. Assuming the defender cannot get his king in front of the pawn, he should move his king towards the comer diagonally opposite the pawn's promotion square. If the defender's king can reach this comer, the position may still be drawn even if the pawn is on the seventh rank."> John Nunn

F. 1.0
White to move at 63


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Syzygy says it is a tablebase draw
'https://syzygy-tables.info/?fen=Q7/...

Note: 63. Qg2+ can be met by 63...Ke1!

Game continued with 63. Qe8+

F. 1.1
Black to move at 63


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Syzygy says it is a tablebase draw by moving Black king to the f-file
'https://syzygy-tables.info/?fen=4Q3...

63...Kf1!? <"The king heads toward for the main drawing zone h1, g1, h2, and g2, in the southeast corner."> Karsten Müller

Note: 63...Kd2? is met by 64. b5!

Game continued:

64. b5 Qc7+ 65. Kd5 Qb7+ 66. Qc6 Qf7+ 67. Kd6 Qf4+ 68. Kd7 Qf7+ 69. Kc8 Qf8+ 70. Kb7 Qe7+ 71. Qc7 Qe4+ 72. Ka6 Qa4+ 73. Qa5 Qc4 74. Qa1+

74...Kg2 <"Postny's king has reached the drawing zone."> Karsten Müller

75. Qb2+ Kh1 76. Qh8+ Kg1 77. Qg7+ Kh1 78. Qb7+ Kh2 79. Qc6 Qa2+ 80. Kb7 Kg1 81. Qc1+ Kf2 82. Qc5+ Kf1 83. b6 Qg2+ 84. Ka6 Qa8+ 85. Kb5

F. 1.2
Black to move at 85


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Syzygy says it is a tablebase draw with 85...Qe8+ every other move loses
'https://syzygy-tables.info/?fen=q7/...

85...Qe8+! <"The king can't enter the drawing zone at this time. So the check is the only drawing move."> Karsten Müller

Game continued:

86. Ka5 Qe1+ 87. Ka6 Qa1+ 88. Qa5 Qf6 89. Qb5+ Kg1 90. Qc5+ Kh1 91. Ka7 Qa1+ 92. Kb7 Qg7+ 93. Qc7 Qf8 94. Qd7 Qf2 95. Qd5+ Kg1 96. Qg5+ Kh1 97. Kc6 Qc2+ 98. Kd6 Qh2+ 99. Qe5 Qh6+ 100. Kc5 Qc1+ 101. Kd5 Qd2+ 102. Qd4 Qg5+ 103. Kc4 Qc1+ 104. Qc3 Qf1+ 105. Kb4 Qb1+ 106. Qb3 Qe1+ 107. Kb5 Qe5+ 108. Ka6 Qa1+ 109. Kb7 Qg7+ 110. Kc6 Qf6+ 111. Kc5 Qe7+ 112. Kd4 Qf6+ 113. Kd3 Qf5+ 114. Kc3 Qe5+ 115. Kb4 Qe1+ 116. Qc3 Qb1+ 117. Ka5 Qa2+ 118. Kb5 Qd5+ 119. Qc5 Qd3+ 120. Kc6 Qg6+ 121. Kb7 Qf7+ 122. Ka6 Qa2+ 123. Qa5 Qe2+ 124. Ka7 Qf2 125. Qd5+ Kg1 126. Kb7 Qf8 127. Qd4+ Kh1 128. Qe4+ Kg1 129. Qe3+ Kh1 130. Ka7 Qf2!?

F. 1.3
White to move at 131


click for larger view

Syzygy says it is a tablebase draw
'https://syzygy-tables.info/?fen=8/K...

<"A nice stalemate joke."> Karsten Müller

131. Qe4+ Kg1 132. Kb7 Qf7+ 133. Kc6 1/2-1/2

<"and after his fantastic defensive performance Postny probably claimed a draw as per the 50-move rule."> Karsten Müller

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