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Subject: Testposition - Bishop ending

Author: Sune Larsson

Date: 15:40:40 02/28/01



  [D]8/2k4p/p1p1bp2/8/1P2PP2/4K3/7P/5B2 w - - 0 1

  This is a position used by chesstrainers in Georgia (former USSR].
  Got it from the horse's mouth during a combined vacation/chesstraining
  stay in Tbilisi a few years ago. It's from the game Eliskases-Capablanca,
  Semmering 1937. We have a bishop ending (same colors) with 4 pawns each.
  White is on the move and to conserve winning chances, he must avoid early
  simplification and - if possible - keep the pawns on both wings.
  Thus 1.Bxa6 Kb6 followed by 2.-c5 constitutes a wrong approach whereas
  1.Kd4 is the right one.

  1.Kd4 Kb6  [otherwise 2.Kc5]  2.Bc4 Bg4  [the pawn ending is lost]
  3.e5 fxe5+ 4.fxe5 h6 5.h4 Bh5 6.e6 Be8 and black had many problems
  to overcome. White ultimately won the game.

  Test: 1. Kd4! should be chosen by your program. 1.Bxa6? draws.

  Sune





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