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Louis Charles Mahe De La Bourdonnais vs Alexander McDonnell
London m4 ;HCL 18 (1834), 03, rd 49
Bishop's Opening: Boi Variation (C20)  ·  1/2-1/2

ANALYSIS [x]

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Kibitzer's Corner
Sep-30-04  Knight13: Umm... Good duel.
Sep-30-04
Premium Chessgames Member
  suenteus po 147: Why not play 59...Kxb3? Am I missing something? Is this a theoretically drawn endgame?
Sep-30-04  Knight13: <suenteus po 147> I agree with your Idea.
Apr-22-06
Premium Chessgames Member
  Gypsy: <Is this a theoretically drawn endgame?> I believe so.
Apr-22-06  Milo: Kxb3 gets hit with c5+, maybe?
Apr-22-06  Milo: uh, never mind :)
May-07-06  sneaky pete: 31.Ne7 .. is premature. The weakening of the white squares could have been exploited by playing 31.Ba4 .. (suggested by Staunton), threatening Nf5-e7-c6+, winning at least pawn d5, unless black prefers giving up the exchange.
Dec-16-07  nimh: Rybka 2.3.1 mp, AMD X2 2.01GHz, 10 min per move, threshold 0.33.

De La Bourdonnais 8 mistakes:
23.Bc2 1.25 (23.a6 1.91)
25.Qe2 1.59 (25.Qd3 2.14)
31.Ne7 2.04 (31.Ba4 3.97)
37.Bg6 0.89 (37.Re5 1.86)
38.Rxf6 0.48 (38.Re8 0.88)
51.Bd1 0.00 (51.h5 6.62)
53.Kf3 1.06 (53.Bf3 3.03)
54.Bf5 0.05 (54.Ke4 1.88)

McDonnell 12 mistakes:
13...Nh7 0.57 (13...Nh5 0.12)
22...d5 1.91 (22...a6 1.11)
23...Qf7 1.94 (23...g4 1.25)
26...b6 2.14 (26...b5 1.33)
27...Rhe8 2.87 (27...Rde8 2.02)
28...Qxd5 3.67 (28...Nb8 2.85)
39...fxg3 0.82 (39...d4 0.48)
45...Kb4 3.45 (45...Kd4 1.06)
46...Kc3 5.11 (46...b5 3.45)
49...Kd2 7.95 (49...Kd4 4.62)
52...Kc3 3.03 (52...Kc2 2.08)
53...Bd4 1.88 (53...Be1 1.06)

Dec-16-07  sambo: <suenteus po 147: Why not play 59...Kxb3? Am I missing something? Is this a theoretically drawn endgame?> Endgames are my weakness, but I believe that since the bishops are opposite colors there will always be a way for one player to block the other's queening squares. Not totally sure, but that seems to be the principle.

I think in this instance a reasonable ending would be 59...Kxb3 60. Be6 and white can defend both of his queenside pawns by shuttling his bishop between d5 and b7.

Feb-01-12  Knight13: Compared to many of the other La Bourdonnais vs McDonnell games, this one is smoother with sprinkles of modern play.

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