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Alexander Alekhine vs Efim Bogoljubov
Alekhine - Bogoljubov World Championship Match (1929), Wiesbaden GER, rd 3, Sep-09
Slav Defense: Czech. Wiesbaden Variation (D17)  ·  1/2-1/2

ANALYSIS [x]

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Kibitzer's Corner
Aug-02-06
Premium Chessgames Member
  Honza Cervenka: Very instructive Bishop endgame. Alekhine tried to win it but Bogo defended well.
Feb-09-08  Calli: 53.Bh5? loses a move. It looks like 53.Kxg5 Bxg2 54.Kg4 Kf6 55.Be4 should win Alekhine gives 55...Bf1 56.Kxh4 Bc4 57.Kg4 Be6+ 58.Kxf4 Bxh3 with a winning position.
Mar-04-08  Knight13: Bogoljubov placed all of his pawns opposite of Alekhine's bishop and Alekhine's pawns mostly were on the same color of Bogoljubov's B. That should tell you something...
Jul-16-09
Premium Chessgames Member
  Honza Cervenka: <53.Bh5? loses a move. It looks like 53.Kxg5 Bxg2 54.Kg4 Kf6 55.Be4 should win Alekhine gives 55...Bf1 56.Kxh4 Bc4 57.Kg4 Be6+ 58.Kxf4 Bxh3 with a winning position.> Yes, it really makes huge difference here. Bishop endings can be quite tricky and even the world champion can go wrong in them.

<Bogoljubov placed all of his pawns opposite of Alekhine's bishop and Alekhine's pawns mostly were on the same color of Bogoljubov's B. That should tell you something...>

The active King was more important factor here.

Sep-04-11  galdur: Simply 47. a6 or Kc6 seem to win easily.
Jul-09-13  McChesser: @Galdur- I just analyzed (i.e. calculated the old fashioned way) the implications of 47.Kc6/Kc7 with the idea of running at the the black a-pawn to create a queen. I believe 47.a6 just puts another target on a light square and I don't quite see the point/plan to win behind it. Perhaps someone else could give some lines, but I didn't focus on it. 47.Kc6 runs into a cute defensive trick I found, which is quite instructive and can be seen in the following sample lines: A) 47.Kc6 Ke7 (tempo) 48.Bc4 Be8 49.Kb7 Kd7 50.Kxa7 Kc7! 51.Ka6 Bc6 52.Bb5 Bb7+ 53.Ka7 Bc8 draws

B)48.Bf5 Be8 49.Kb7 Kd7 etc except this time white doesn't even have the plan to try to play Bb5 and then escape from the corner because of the placement of his bishop

C)(48.Kb7? Kxe6 49.Kxa7 Kd6 50.Kb6 Bc6 51.a6 Ba8 52.a7 Bc6 is a draw )

Sep-19-13  Karpova: Bogoljubov offered a draw on move 40 (at that point the game was adjourned).

Source: Page 294 of the October 1929 'Neue Wiener Schachzeitung'

Mar-02-14
Premium Chessgames Member
  offramp: <McChesser> is right, I think. I don't think Alekhine missed a win. Black played 46...Ke8


click for larger view

Play might have continued 47. Bd7+ Kf8 48. a6 Bf7 49. Bb5 Bb3 50. Kc7 Ke7 51. Kb7 Kd6 52. Kxa7 and now Kc7 traps the white king


click for larger view

and the game is a draw.

Nov-18-17  andrea volponi: 44...Bxc4! -Kxc4 Kc6 -a6 Kd6 -Kb5 Kd7 -Kc5 Kc7 -Kd5 Kd7 -e5 fxe5 -Kxe5 Kc6 -Kf5 Kb5 -Kxg5 Kxa6 -Kxf4 Kb5 -Kg5 Kc6 -Kxh4 draw

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