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Advanced strategy in the endgame by Jan van Reek
Lesson 14: OverprotectionKorchnoi, Viktor - Tal, Mikhail (1968)
A chessman in the own position gets extra support in the case of overprotection. The support to an advanced pawn in the middle game is well-known. White gets support from behind in the following endgame. The endgame is easily won, according to Keene. He is wrong as always.45. Ra7 Rb8 46. h5 Kg8
48. Kg4 ?! The king stands slightly offside. Pawn f2 is the weakness in white's position.
[The win is achieved more quickly in 48. Ke4 ! Rb2 49. f3 Rb3 50. h6 f5+ ! 51. Kxe5 Rxe3+ 52. Kf6 Re8 53. f4 ! ]
Kg7 ?!Tal fails to set problems.
[Korchnoi analyses Rb2 ! 49. f3 Rb3 He finds the complex win 50. h6 !! Rxe3 Kf5 ! Rb3 52. g4 Kf7 53. Ra7+ Kg8 54. Rg7+ Kh8 55. Rd7 Kg8 56. Ke6 ! Rb6+ 57. Ke7 Rb8 58. Rd3 ! Rf8 59. Ke6 Kh8 60. Kf5 Kg8 61. Rd6 The win is clear at last. ]
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