Author: John Merlino
Date: 12:59:10 11/04/05
Go up one level in this thread
On November 04, 2005 at 12:43:09, Jouni Uski wrote:
>[D]r1b1k1nr/ppp2ppp/n7/3pp3/N3q3/PK6/1PPP2PP/R1BQ1BNR b kq - bm Qxa4+ = draw
>
>Maybe incorrect (Hampe - Meitner 1872)?
>
>Jouni
Looks pretty good to me, but there might be a hole. Here's the best line, which
is very hard to find:
1...Qxa4+ 2.Kxa4 Nc5+ 3.Kb5! {3.Kb4 a5+ 4.Kc3 d4+ 5.Kc4 b6! 6.Qf3 Be6+ 7.Qd5
Bxd5+ 8.Kxd5 =} 3...Ne7 4.c4 d4! 5.Kxc5 a5! 6.Qa4+ {6.Qb3 b6+ 7.Qxb6 cxb6+ =}
6..Kd8 7.Qxa5 {all other moves = or worse} 7...Rxa5+ 8.Kb4 Nc6+ 9.Kb3
...resulting in this position:
[D]2bk3r/1pp2ppp/2n5/r3p3/2Pp4/PK6/1P1P2PP/R1B2BNR b - - 0 9
Does anybody even evaluate THIS as a draw? Noting that we're 18 plies into the
line, it's no wonder that comps have a hard time with it.
CM9_R1 on an AMD 2500 says this:
Time Depth Score Positions Moves
0:00 1/5 1.98 8738 9...e4 10.d3 e3 11.Kc2 Re8 12.Nf3
0:00 1/5 1.97 20497 9...Bg4 10.Be2 Bf5 11.d3 Kc8 12.Bd2
Ra6
0:00 1/5 1.88 25033 9...Bf5 10.d3 b5 11.c5 Re8 12.Kc2
0:00 1/6 2.08 36805 9...Bf5 10.d3 Re8 11.Bd2 Ra6 12.Ka2
Kc8
0:00 1/6 1.87 47086 9...Bg4 10.Be2 Bf5 11.g4 Be4 12.Nf3
d3
0:00 1/6 1.71 54641 9...e4 10.d3 e3 11.Kc2 Re8 12.Nf3
Bg4
0:00 1/7 1.78 93204 9...e4 10.d3 e3 11.Kc2 Re8 12.Be2
Bf5 13.Nf3
0:00 1/8 1.70 206672 9...e4 10.Ka2 Re8 11.Kb1 Bd7 12.Nh3
Kc8 13.Nf4 d3
0:01 1/9 1.82 492689 9...e4 10.Ka2 Bf5 11.Ne2 Nb4+ 12.Kb3
Nc6 13.Ng3 Bg4 14.Be2 Bxe2 15.Nxe2
0:05 1/10 1.75 1427244 9...e4 10.Ka2 Re8 11.b3 Bf5 12.Ne2
Kc8 13.Nf4 g5 14.Nd5 Kb8
0:13 1/11 1.87 3727892 9...e4 10.Ka2 Re8 11.b3 Bf5 12.h3
h5 13.Ne2 Nb4+ 14.Kb2 Nd3+ 15.Kb1
Nxc1 16.Kxc1
0:39 1/12 1.71 11150646 9...e4 10.Ka2 Re8 11.Kb1 d3 12.b3
Nd4 13.Ka2 Nc2 14.Rb1 Bg4 15.Nh3
Kc8
1:44 2/13 1.85 30349276 9...e4 10.d3 e3 11.Be2 Re8 12.Kc2
Bf5 13.Nf3 Nb4+ 14.axb4 Rxa1 15.Nxd4
Bd7 16.Rf1 f6
jm
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.