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Louis Charles Mahe de La Bourdonnais vs Alexander McDonnell
La Bourdonnais - McDonnell 4th Casual Match (1834), 02, rd 48
Queen's Gambit Accepted: Old Variation (D20)  ·  1/2-1/2

8
7
6
5
4
3
2
a
1
b
c
d
e
f
g
h
White to move.
ANALYSIS [x]
Notes by Stockfish 9 v010218 (minimum 6s/ply)7.Qe2+ was played in C Marcelin vs Li Shilong, 2006 (1-0)8...Re8+ was played in La Bourdonnais vs McDonnell, 1834 (0-1)better is 10.Qc2 Ne7 11.Ne5 c6 12.Re1 Nfd5 13.Nxd5 cxd5 14.Bd3 Be6 = +0.21 (24 ply)= -0.37 (23 ply)better is 15.Ne5 Bb7 16.Bf4 b4 17.Ne4 Nxe4 18.Bxe4 Bxe4 19.Qxe4 = -0.06 (23 ply) ⩱ -0.68 (24 ply) 16.Nxd6 Qxd6 17.Qe5 Rfd8 18.Bf4 Qxe5 19.dxe5 Nd5 20.Bd2 = -0.39 (25 ply)better is 16...Bxe4 17.Bxe4 Re8 18.Ne5 Bxe5 19.dxe5 Nxe4 20.Bxa5 ⩱ -1.43 (27 ply) ⩱ -0.82 (24 ply)better is 18...Bxe4 19.Bxa5 Qxa5 20.Qxe4 Bc7 21.f4 Qb6 22.Qd5 Qf6 ⩱ -1.20 (24 ply) ⩱ -0.67 (26 ply) 20...Qxa5 21.Qxe4 Rad8 22.Rfe1 Rd2 23.Re2 Rxe2 24.Qxe2 ⩱ -0.94 (25 ply)= 0.00 (26 ply) 24...Bd3 25.Qe3 R6e7 26.b3 Rd7 27.bxc4 Qxc4 28.Ba5 Rd5 = -0.05 (23 ply) 25.exf6 Rxf6 26.Bxf6 Qxf6 27.Qh5 Bg6 28.Qd5+ Kh7 29.f5 ± +1.92 (27 ply)= 0.00 (26 ply) after 25...Qb6 26.Qd2 Qc6 27.Bb4 Rg6 28.g3 Bd3 29.Bc3 Rge6 better is 26...R8e7 27.Bb4 Rd7 28.Rxd7 Qxd7 29.Qd2 Qc6 30.Qe1 a5 = -0.21 (21 ply)= +0.46 (23 ply)better is 28...Qb6 29.Qxb6 Rxb6 30.b3 Rf8 31.bxc4 bxc4 32.g5 hxg5 = +0.13 (22 ply)better is 29.Rgd2 Bd3 30.gxf5 Bxf5 31.Rd7+ R6e7 32.R7d6 Qb7 33.Rb6 ⩲ +0.77 (28 ply)= +0.07 (21 ply) after 29...Qb7 30.Qd2 Kg8 31.Rgg1 Bd3 32.b3 Qb6 33.g5 h5 34.Ba5 better is 30...Rd8 31.Qd2 Rxd4 32.Qxd4 Re8 33.Ba5 Qc6 34.Bb4 Qc7 = +0.04 (26 ply) ⩲ +0.78 (23 ply)better is 32...Qg7 33.Qb6 Qf7 34.g5 Ba8 35.gxh6 Qb7 36.Qxb7+ Bxb7 = +0.48 (28 ply) ⩲ +1.00 (23 ply) after 33.Rg1 Bd3 34.b3 Bc2 35.Rg2 Be4 36.Rd2 cxb3 37.axb3 Qc8 33...Qb7 34.g5 b4 35.Be1 h5 36.Qxc4 Rxd6 37.exd6 Rd7 ⩲ +0.55 (25 ply)+- +3.71 (25 ply) 35.Rxd3 cxd3 36.Qxd3 Kg8 37.hxg6 Qc5 38.Rxe6 Rxe6 39.f5 +- +4.47 (27 ply)= +0.22 (29 ply)better is 44.Ke3 Bf5 45.Qa7+ Qg7 46.Qxg7+ Kxg7 47.Kd4 Be6 48.Kc5 = 0.00 (30 ply)better is 44...Be6 45.Qa7+ Kg6 46.Qxa6 Qg3+ 47.Ke2 Qg4+ 48.Ke3 Kf5 ⩱ -0.59 (23 ply)= 0.00 (28 ply) 52...Kh5 53.Qe3 Qd3+ 54.Qxd3 cxd3 55.Kd4 Kg4 56.Bxa5 h5 = -0.38 (27 ply) 53.Qf6+ Ke8 54.Qxf5 b4+ 55.Kc2 c3 56.Bc1 Qc4 57.bxc3 +- +4.84 (23 ply)= -0.49 (28 ply) 54...h5 55.Kc1 Qh1+ 56.Kc2 Qh3 57.Bxa5 Qf5+ 58.Kc1 Qxf4+ ⩱ -0.86 (24 ply)= 0.00 (32 ply) 68...Bf5 69.Be3 Kf3 70.Bd2 Be6 71.Kh1 Kg3 72.Be1+ Kxf4 -+ -3.50 (56 ply) ∓ -1.78 (42 ply) 73...Bf5 74.Bd4 b4 75.axb4 Kxb4 76.Kh4 h2 77.Kg5 Bd7 -+ -12.65 (27 ply) ⩱ -0.61 (32 ply)93...Qh7+ 94.Kg5 Qg8+ 95.Kh6 Qh7+ = 0.00 (39 ply)1/2-1/2

rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1
FEN COPIED

Annotations by Stockfish (Computer).      [35434 more games annotated by Stockfish]

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Kibitzer's Corner
Oct-10-04
Premium Chessgames Member
  Chessical: An alternative try for De Labourdonnais was: <69...Bd7>; but even here it seems that Macdonnell can hold the position even after dropping a pawn:

<70.Ba5> (70.Bc1?! Ke2 71.Kg1 Kd3) 70...Kxf4 71.Bc7 Be6 72.Bd6 b4 73.Bxb4 Kxe5 74.Bc3+ Kf4 75.Bd4 Kf3 76.Bc3 Ke4 77.Kg3 Bf5 78.Bf6 Kd3 79.Bc3

May-18-06  sneaky pete: 73... b4 was ill timed (leads to the loss of a vital tempo on move 77). De La Bourdonnais suggested 73... Bd7 74.Kh2 Bc8 75.Kg3 b4 winning (76.axb4 a3 77.bxa3 Kxc3 78.b5 Kd2 79.b6 c3 80.e6 c2 81.e7 c1Q 82.e8Q Qg1+ and # next move).
Dec-04-07  nimh: Rybka 2.4 mp, AMD X2 2.01GHz, 10 min per move, threshold 0.33.

De La Bourdonnais 8 mistakes:
16.Bd2 -0.91 (16.Nxd6 -0.35)
25.Kh2 0.00 (25.exf6 1.69)
25.hxg6+ 0.66 (35.Rxd3 3.25)
37.Rg2 0.00 (37.Rg3 0.72)
53.Qa7+ -0.40 (53.Qf6+ 3.63)
61.Qe2 -0.48 (61.Qf2 0.00)
62.Qf2 -1.49 (62.Bf2 -0.53)
66.Kg2 -3.23 (66.f5 -1.60)

McDonnell 8 mistakes:
20...Qd5 -0.19 (20...Bd3 -0.80)
24...f5 1.69 (24...Bd3 -0.05)
26...g6 0.28 (26...Rg6 -0.18)
28...Be4 0.48 (28...Rf8 0.07)
33...Bd3 3.01 (33...Qb7 0.45)
52...Kf7 3.63 (52...Kh5 -0.38)
73...b4 -1.10 (73...Bd7 -2.50)
77...Bd5 -0.04 (77...Bc8 -1.27)

Feb-01-12  Knight13: You can tell they fought fiercely in a drawish game. :-) 66. f5 Bxf5 67. Bf4 must be what nimh's Rybka is referring to.
Feb-04-12  Knight13: I like 12...b5 13. Bc2 Bb7 or ...Nc4 more.
Nov-23-23  Mathematicar: On of the first famous games with GQA 3... e3 e5 line.

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