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Arshak B Petrosian vs Vitaly Tseshkovsky
URS-ch FL44 (1976), Minsk URS, Oct-??
Zukertort Opening: Kingside Fianchetto (A04)  ·  1/2-1/2



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Kibitzer's Corner
Jun-28-18  Sally Simpson:

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Black to play. A draw was agreed but there is an instructive Black win pointed out by Gerardus C van Perlo in his 'Endgame Tactics'.

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57... b3 58. Rd8+ Kc5 59. Rc8+ Kd4 60. Rd8+ Ke3 61. Rb8

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The only way. 61...c2 draws. (see next)

62. Ke5 Kf3 63. Kf5 Ke2 64. Ke4 ....

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64....Kd1 65. Kd3 c2 66. Rh8

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66....c1=N+ then b1=Q 0-1.


Why 61...c2 does not win.

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61...c2 62.Rxb3+ Kd4 63.Rb4+

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63...Kc3 64.Rb8 and 65.Rc8+ ½-½

63...Kc5 64.Rb8 ½-½

63...Kd3 or Ke3. 64.Rb3+ forcing the Black King back to d4 if the BK goes to the 2nd Rank Then Rb2 and Rxc2 ½-½.

Jun-30-18  Howard: Presumably, the tablebases back all this up.
Jul-01-18  Sally Simpson: Hi Howard,

I would think so, I assume van Perlo computer checked his variations.

I played over the variations they seem sound. The only trouble might be me copying text to here but I did double check it.

van Perlo did say it was difficult to see the win from the final agreed drawn position.

Jul-02-18  Retireborn: I think this may be one of several similar (R v Ps) endgames looked at in a special article in a very early (1986?) issue of NiC, but cannot recall what the verdict was then.
Nov-05-19  Straclonoor: <Presumably, the tablebases back all this up.> Yes, of course.

50... c4 51. Rd2+ Kc6 52. Rd8 b5 53. Kg6 b4 54. h7 b3 55. h8=Q Rxh8 56. Rxh8 b2 57. Rb8 c3 58. Kf6 c2 59. Rc8+ Kd6 60. Rxc2 b1=Q 61. Rd2+ Kc6 62. Rf2 Qb3 63. Rf4 Kd5 64. Rf5+ Kd6 65. Rf4 Qd3 66. Rf5 Qg3 67. Kf7 Qh3 68. Ra5 Qc8 69. Kg6 Ke6 70. Rg5 Qc2+ 71. Kg7 Qd3 72. Rg6+ Kf5 73. Rf6+ Kg5 74. Rf7 Qc3+ 75. Kh7 Qd4 76. Rc7 Qe4+ 77. Kg8 Qe6+ 78. Kh7 Kf6 79. Rg7 Qe8 80. Ra7 Qe4+ 81. Kg8 Qd5+ 82. Kh8 Qh1+ 83. Kg8 Qg1+ 84. Kh7 Qxa7+ 85. Kh6 Qd786. Kh5 Qh3# Lomonosov TB7

Premium Chessgames Member
  NM JRousselle: Did Black miss the obvious 23... Bc3 followed by Re4?

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