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Valentina Jorquera Cabello vs Evandro Amorim Barbosa
American Continental (2014), Praia da Pipa BRA, rd 1, Oct-18
Formation: King's Indian Attack (A07)  ·  0-1

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
Feb-06-21
Premium Chessgames Member
  g15713: E. 1.0
Black to move at 45


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Syzygy says position is a draw
'https://syzygy-tables.info/?fen=8/5...

Black played 45...Rg2

E. 1.1
White to move at 46


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White can draw by playing any of the following moves:
46. Kd3 or Ke3 or Ra5 or Reb5 or Rc5 or Re3

'https://syzygy-tables.info/?fen=8/5...

Both sides misplayed the the ending from here...

Feb-06-21
Premium Chessgames Member
  Korora: <Both sides misplayed the the ending from here...>

Well, they say the winner is the one who blunders next-to-last.

Feb-08-21
Premium Chessgames Member
  g15713: My fault for not analyzing this game further but this particular double rook ending was difficult for me to understand...

<"In general, a small material advantage in a double rook ending (for example, a pawn) promises the attacking side more winning chances than in a single rook ending. One of the obvious reasons for this is that the extra pawn can provide important cover for the king. Also lone pawns are more exposed to attack in double rook endings."> John Emms

Black to move at 45
Going back to E. 1.0


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45...Kh6 is met by 46. Ree6 or Rb1 or Re1 (draw)

Black played 45...Rg2
Going back to E. 1.1


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'https://syzygy-tables.info/?fen=8/5...

White played 46. Ree6? (Note 46. Rbe6 is met by 46...Kh6!)

E. 1.2


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Now only 46...Rg3! wins (prevents 47. Ke3 and 47. Re3 is met by 47...Rd7+) Instead Black played 46...Kh6? which draws

E. 1.3


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Game continued with:
47. Ke3! Kh5 48. Rb1 g5

E. 1.4


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Now only 49. Re4! draws
Instead White played 49. Rbb6? (making the last mistake)

E. 1.5


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Game continued:
49...Rgf2 50. Rh6+ Kg4 51. Rbg6 R7f3+ 52. Ke4 Re2+ 53. Kd4 Rf4+ 54. Kd3 Re7
<(54...Re7 has to be a typo 54...Re5 must have been played otherwise g-pawn falls on 55...Kg3)>
55. Rg8 Kg3 56. Rh5 Rf5 <(Rff5)> 57. Kd4 Kf4 58. Rh1 Re4+ 59. Kd3 Rd5+ 60. Kc3 Re3+ 61. Kc4 Rf5 62. Kd4 Rf3 63. Rg1 Rf2 64. Kd3 Rd5+ 65. Kc4 Re5 66. Rf8+ Rf5 67. Rg8 Rc2+ 68. Kd3 Rcc5 69. Rf1+ Kg3 70. Rxf5 Rxf5 71. Ke4 Rf4+ 72. Ke3 g4 73. Ke2 Kg2 74. Rg7 g3 75. Ke3 Rf5 76. Rg6 Kh2 77. Ke2 g2 78. Rh6+ Kg1 79. Rg6 Rf7 80. Rg8 Rh7 0-1

Feb-08-21
Premium Chessgames Member
  g15713: Again, my fault for not going through the entire game to analyze
Instead of finishing in middle of the night one should have waited until the next day

E. 1.6
Black to move at 63


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Syzygy says Black is winning with either 63...Rg3 or Ra3
'https://syzygy-tables.info/?fen=6R1...

E. 1.7
Black played 63...Rf2?


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Now 64. Ra8 draws

E. 1.8
But White returned the favor with 64. Kd3?


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Now 64...Rf3+ is the proper winning line

E. 1.9
Black played 64...Rd5+ 65. Kc4 (Black has to go back 65...Rf5 to win)


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E. 1.10
Black played 65...Re5?


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66. Kc3 or Kd4 draws but White returned the favor with 66. Rf8+ Rf5 67. Rg8


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Now 67...Rf3 is the proper winning line

E. 1.11
Black played 67...Rc2+ 68. Kd3 (Black has to go back 68...Rf2 to win)


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E. 1.12
Black played instead 68...Rcc5


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Now 69. Ke2! draws

E. 1.13
White played instead 69. Rf1+ Kg3 70. Rxf5 Rxf5


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Finally, one has a single rook endgame which Black won

Only Syzygy came out looking good in chess analysis...

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