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Karel Opocensky vs Paul Keres
Buenos Aires Olympiad Final-A (1939), Buenos Aires ARG, rd 14, Sep-16
Queen's Indian Defense: Opocensky Variation (E17)  ·  0-1

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
Mar-11-11  Lovuschka: White should have tried 71.Ka3, and we would have a position similar to a famous Lasker study.


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71...Kb1 72.Rb8+ Ka1 73.Rc8 Rh3+ 74.Ka4 Kb2 75.Rb8+ Ka2 76.Rc8 Rh4+ 77.Ka5 Kb3 78.Rb8+ Ka3 79.Rc8 Rh5+ 80.Ka6 Kb3 81.Rb8+ Ka4 82.Rc8 Rh6+ 83.Ka7 Rxh7+ and black wins.


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Emanuel Lasker
Deutsches Wochenschach, 13.vii.1890 (Version)
White wins

1.Kb8! etc

Mar-11-11  Lovuschka: Correction: White should have tried 70.Ka3 (not: 71.Ka3) etc.
Aug-10-11  Nightsurfer: The early foray by Black Knight right into the center, namely 6. ... Ne4! and thus boldly seeking confrontation with White Nc3, has got new support in the last decades of the 20th century, please compare B Koester vs R Gralla, 1973 and S Amiri vs R Rezaei, 1992 , and at the beginning of the 3rd millennium, please replay Deep Fritz vs Kramnik, 2002 (though in the latter case the Swing of Horse has been executed one move later, namely with 7. ... Ne4 after the foregoing 6.0-0 0-0 7.Nc3 ...).
Mar-19-19
Premium Chessgames Member
  woldsmandriffield: Opocensky defended the ending superbly up to this point:


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Now White snaffled the a4 pawn. Instead, 68..Rc8 is a straightforward draw.

Sep-06-21  tbontb: Keres finds himself on the right side of this difficult ending, compared to Bondarevsky vs Keres, 1939 and eventually brings home the win! As noted previously, 71.Kxa4 is the losing move while e.g. 71.Rg8 is a tablebase draw with exact play. Alekhine indicates several easier wins earlier on, the last being 52....f5 53.Rh7 Ke5 54.Rxh5 Rxb7, keeping the passed f-pawn.
Nov-02-23
Premium Chessgames Member
  MissScarlett: It's been pointed out that the current ending from <48...Kd5 49.Rf7 Rxg3+ 50.Kc2 Rg4 51.b7 Rb4 52.Rxg7 a4 53.Rf7 Kc6 54.b8=Q Rxb8 55.Rxf6+ Kb5 56.Rh6 Rg8 57.Rxh5 Rg2+ 58.Kc3 Rg3+ 59.Kc2 Kb4 60.Rh8 Rg2+ 61.Kb1 Rh2 62.h5 c4 63.Rb8+ Kc3+ 64.Rh8 Rh1+ 65.Ka2 Kd2 66.h6 c3 67.h7 Kc2 68.Ka3 (Kc1 69.Kxa4 c2) 70.Rg8 Rxh7 71.Kb3 Kb1 0-1> is incorrect and needs replacing with <48...Kd6 49.Rf7 Rxg3+ 50.Kc2 Rg4 51.b7 Rb4 52.Rxg7 a4 53.Rf7 Kc6 54.b8Q Rxb8 55.Rxf6+ Kb5 56.Rh6 Rg8 57.Rxh5 Rg2+ 58.Kc3 Rg3+ 59.Kc2 Kb4 60.Rh8 Rg2+ 61.Kb1 Rh2 62.h5 c4 63.Rb8+ Kc3 64.Rh8 Rh1+ 65.Ka2 Kd2 66.h6 c3 67.h7 Kc2 68.Ka3 Rh4 69.Ka2 Rh3 70.Ka3 Kc1 71.Kxa4 c2 72.Rg8 Rxh7 73.Kb3 Kb1 0-1>.

This tallies with (1) "107 Great Chess Battles 1939-1945" by Alekhine (Dover 1980, pp. 197-199), (2) "Paul Keres: Photographs and Games" (Paide 1995, p. 129), (3) Olimpbase.

Jun-07-24
Premium Chessgames Member
  plang: The system with 7 Bd2 was first played by Opocensky in this tournament. Alexander and Petrov had each tried 9..Nxd2 against Opecensky earlier in the tournament with the first game ending in a win for White and the second ending in a draw; 9..Nxc3 was new. Keres outplayed White positionally in the middlegame resulting in an advantage in the rook ending. 72 Rg8 lost immediately, a tougher defense would have been 72 Ka5..Kb2 73 Rb8+..Ka3 74 Rc8..Rh5+ 75 Ka6..Kb3 76 Rb8+..Ka4 77 Rc8..Rh6+ 78 Ka7..Rxh7+ and wins (using the same general approach as in the Lasker study).

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