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Louis Charles Mahe De La Bourdonnais vs Alexander McDonnell
London m4 ;HCL 18 (1834), 09, rd 55
King's Gambit: Accepted. Greco Gambit (C38)  ·  1/2-1/2

ANALYSIS [x]

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Kibitzer's Corner
Apr-25-03  refutor: instead of 89.Kd5? Karsten Muller and Frank Lamprecht's "Fundamental Chess Endings" gives the position after the 88th move as winning for White with

89.♖a4 ♘c6 90.♔d5 <now the king can start his journey to a8> 90. ... ♘a7 91.♔d6 ♔b5 92.♖a1 ♔b6 93.♔d7 ♘b5 94.♔c8 ♔a7 <94. ... ♘a7+ 95.♔b8 ♘c6+ 96.♔a8 ♘a7 97.♖b1+ ♘b5 98.♖xb5+ > 95.♖a5 ♘d4 <95. ... ♔b6 96.♖xb5+! ♔xb5 97.a7+-> 96.♔c7 ♘b3 97.♖a3 ♘d4 98.♖a4 ♘f5 99.♔d7 ♘e3 100.♔c6 ♘f5 101.♖e4 ♘g3 102.♖e5 ♘f1 103.♔b5 ♘d2 104.♖e7+ ♔a8 105.a7 ♘c4 106.♖e8+

May-20-06  PolishPentium: Your friendly neighbourhood PolishPentium is unable to discern why White does not play 43 Qd8+ as a prelude to snatching the N at d7. Would this not be enough of an advantage to snare the win? Or would the tempi for Black lead to a draw by perpetual check anyway? Comments from contributors wiser than i would be greatly appreciated...
May-20-06  geraldo8187: draw by perpetual
Dec-06-07  nimh: Rybka 2.4 mp, AMD X2 2.01GHz, 10 min per move, threshold 0.33.

De La Bourdonnais 12 mistakes:
23.Rd1 0.35 (23.Rg1 0.87)
30.Qxg3 1.26 (30.Qh3+ 1.76)
32.Rd1 0.29 (32.Qe4 1.49)
33.Rg1 0.00 (33.Rd2 1.26)
35.Rh1 0.91 (35.Qd4 1.56)
43.Rh7 1.04 (43.Qd8+ 2.25)
53.Qf7 1.01 (53.Qf3 4.71)
59.c4 0.00 (59.Rf8 1.01)
70.Kc2 0.33 (70.Re6 1.19)
78.Rb5 1.69 (78.Rb7+ #14
82.Kxd4 3.76 (82.Rb4 6.05)
89.Kd5 0.65 (89.Ra2 3.76)

McDonnell 21 mistakes:
16...Bxf3 0.00 (16...Kb8 -0.82)
19...Bg7 0.24 (19...Kb8 -0.44)
22...Qh8 0.87 (22...Nd7 0.18)
25...Qh7 1.40 (25...Nd7 0.65)
29...Qxd5 1.76 (29...Nd7 1.28)
32...Qe5 1.26 (32...Qxa2 0.29)
33...Qe3+ 1.16 (33...Qd5 0.00)
34...c6 1.56 (34...c5 1.12)
40...Qe4 1.11 (40...Qf7+ 0.70)
42...Kb6 2.25 (42...Qe7 1.09)
51...c5 4.63 (51...a4 0.90)
63...Qxc6 0.76 (63...c3 0.00)
66...Kb8 1.19 (66...Na5 0.76)
70...Nd6 1.49 (70...d3+ 0.33)
71...Nc8 2.28 (71...Nf5 1.49)
72...Kb7 3.00 (72...Nd6 2.29)
73...Na7 3.78 (73...Kc7 2.29)
74...c3 7.10 (74...Nc6 3.76)
76...Kc7 1.68 (76...Ka8 1.08
78...Na7 4.19 (78...Nb8 1.68)
79...Kc6 6.05 (79...Nc6 4.19)

Jul-07-09  Judah: 89. Kd5 was, of course, a blunder: the right idea a move too early, dropping the pawn (as ...Nb5 threatens both NxR and Nc7+, forking King and Pawn). Any move of the Rook along the a-file would have preserved White's victory, with Ra4 being the most efficient (it allows White's King to go to d5 one move earlier by preventing the potential fork at b4).
Feb-01-12  Knight13: 19...b5? 20. Nxb5! 1-0.
Jan-19-20  Marcelo Bruno: Draw according to Philidor's considerations: K+R against K+N.
Jan-19-20
Premium Chessgames Member
  jnpope: Interesting. After 77.Rxb4, the Lomonosov Tablebase gives mate in 40 for White. In fact White is "mating" until 89.Kd5??.
Mar-01-20
Premium Chessgames Member
  dernier loup de T: <PolishPentium>: after 43.Qd8+ Kc5, 44.QxN would effectively lead to draw after ...44.Qc4+ with a perpetual; however, White seems to have a better option after 43...Kc5: 44.Rh4!, with a dangerous attack....
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