Author: Martin Giepmans
Date: 06:45:43 04/08/02
Go up one level in this thread
On April 07, 2002 at 15:48:22, Terry McCracken wrote:
>Here's an Endgame that should make _all_ chess engines really work!
>
>Fritz 7 sees the draw but doesn't understand the loss after 1.Qe8+..Qf8??
>
>Played by Mieses-NN 1903. Mieses won after Qf8??, I'll give the main line.
>
>
>1.Qe8+ Qf8 2.h5 Nf7 3.Kc2 Nd8 4.Kc3 Nf7 5.a4 Nd8 6.Kc4 Nf7 7.Kd5 Nd8 8.b4 Nf7
>9.Kc6 Nd8+ 10.Kc7 Line
>
>After Qe8+..Kh7! is correct. After 2.Qxd8...Qd2 will draw with perpetual check.
>
>[D]3n2k1/p2P2p1/1p6/7Q/5q1P/8/PP6/1K6 w - -
>
>Terry
I get this:
SpiderChess (amd 1200)
05 00:00:00 + 0.77 H5-E8 F4-F8 B1-C2 G7-G6 E8xF8 G8xF8
06 00:00:00 + 0.33 H5-E8 F4-F8 B1-C2 G7-G6 E8xG6 G8-H8 C2-D3
07 00:00:00 + 0.10 H5-E8 G8-H7 E8xD8 F4-F5 B1-C1 F5-C5 C1-D2 C5-D5 D2-C3
D5xA2
08 00:00:00 + 0.10 H5-E8 G8-H7 E8xD8 F4-F5 B1-C1 F5-C5 C1-D2 C5-D5 D2-C3
D5-E5 C3-B4 E5xB2 B4-C4
09 00:00:02 + 0.10 H5-E8 G8-H7 E8xD8 F4-F5 B1-C1 F5-C5 C1-D2 C5-D5 D2-C3
D5-E5 C3-D3 E5-F5 D3-C4
10 00:00:11 + 0.10 H5-E8 G8-H7 E8xD8 F4-F5 B1-C1 F5-C5 C1-D2 C5-D5 D2-C3
D5-E5 C3-D3 E5-F5 D3-C4 F5-F7 C4-B5
(score +0.10 means that the engine thinks that it is probably a perpetual)
After Qe8 Qf8 the score rises immediately:
05 00:00:00 + 0.75 B1-C2 D8-F7 C2-D3 G7-G5 E8xF8 G8xF8
06 00:00:00 + 0.79 B1-C2 D8-B7 C2-D3 G7-G5 E8xF8 G8xF8
07 00:00:00 + 0.61 B1-C2 G7-G5 E8-G6 G8-H8 G6-H5 H8-G7 H5xG5 G7-H7 C2-D3
08 00:00:00 + 0.65 B1-C2 G7-G5 H4xG5 G8-G7 E8xF8 G7xF8 G5-G6 F8-G7 C2-D3
G7xG6
09 00:00:01 + 0.45 B1-C2 G7-G6 E8xG6 G8-H8 G6-E8 H8-G7 E8-E5 G7-G8 E5-G5
G8-H7 C2-C3 F8-F3 C3-B4 D8-C6 B4-B5
10 00:00:05 + 0.55 B1-C2 G7-G6 E8xG6 G8-H8 G6-E8 H8-G7 E8xF8 G7xF8 H4-H5
F8-E7 H5-H6 D8-F7 D7-D8D F7xD8 H6-H7
11 00:00:11 + 0.70 B1-C2 D8-F7 H4-H5 B6-B5 C2-D3 B5-B4 D3-D4 B4-B3 A2xB3
G7-G5
12 00:00:48 + 0.86 B1-C2 B6-B5 H4-H5 A7-A6 C2-D3 A6-A5 D3-E4 A5-A4 B2-B3
A4xB3 A2xB3 G7-G5
13 00:01:44 + 0.88 B1-C2 A7-A5 H4-H5 A5-A4 C2-D3 B6-B5 D3-E4 D8-F7 E4-D4
A4-A3 B2xA3 G7-G5
Apparently this is mainly eval, allthough the last pv begins to look right ;)
Cheers,
Martin
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