Author: Martin Giepmans
Date: 10:57:19 12/29/02
Go up one level in this thread
On December 29, 2002 at 10:34:56, Thomas Lagershausen wrote:
>[D]r2qr1k1/1p3p1p/p1b1pbpB/4N3/Pn1P4/6R1/1P2QPPP/1B1R2K1 b - - am Bxa4
>
>In a game Spasski-Pachman (Manila 1976) Pachman found the good defence Nb4-d5-e7
>to bring a further defender to his king to protect the weak g6 square.
>
>Wrong is of course ...Bxa4 ?? after b3 nebst Qh5 and Lxg6 white´s attack is
>decisive.Maybe an immediate is also decisive.
>
>Here are an example that this tasc of defence is not trivial.
>
>Two strong programs on paralell analysis on Athlon 1,5 Ghz under Arena-GUI:
>
>s: Yace 0.99.68 UCI 100 MB:
>T1 00:00 -0,97 Lxe5 dxe5
>T1 00:00 0,46 Lxa4
>T2 00:00 0,45 Lxa4 b3
>T3 00:00 0,58 Lxa4 b3 Lc6 Sxc6 Sxc6
>T4 00:00 0,47 Lxa4 b3 Lc6 Tc3
>T5 00:00 0,68 Lxa4 b3 Lb5 Dg4 Dd5
>T6 00:00 0,60 Lxa4 b3 Lc6 Dg4 Dd5 Tc1
>T7 00:01 0,62 Lxa4 b3 Lc6 Dg4 Dd6 Sxc6 Sxc6
>T8 00:04 0,60 Lxa4 b3 Lc6 Dh5 De7 Tc1 Tac8 Dg4
>T9 00:15 0,62 Lxa4 b3 Lc6 Dg4 Dd6 Sxc6 Sxc6 Le4 Tad8 d5
>T10 02:16 0,48 Lxa4 b3 Lc6 Dh5 Te7 Sxf7 Txf7 Lxg6 hxg6 Dxg6 Lg7 Lxg7 Dd5
>T11 04:54 0,51 Lxa4 b3 Lc6 Dh5 Dc7 Sxg6 fxg6 Lxg6 Te7 Lxh7 Kh8 Lg6 Tc8
>T12- 05:39 0,11 Lxa4 b3 Lc6 Dh5 Dc7 Lxg6 fxg6 Sxg6 Lg7 Lxg7 Dxg3 hxg3 hxg6
>T12 01:09:23 -0,14 Lxa4 b3 Lc6 Dh5 Te7 Sxf7 Txf7 Lxg6 Tc7 Lxh7 Kh8 Tg8 Dxg8
>Lxg8 Txg8 Lg5 Kg7
>T13- 01:11:03 -0,54 Lxa4 b3 Lc6 Dh5 Te7 Sxf7 Txf7 Lxg6 Tc7 Lxh7 Kh8 Tg8 Dxg8
>Lxg8 Tac8 Lg5 Kg7
>T13 01:18:54 -0,88 Lxa4 b3 Lc6 Dh5 Dc7 Lxg6 fxg6 Sxg6 hxg6 Txg6 Lg7 Txg7
>Dxg7 Lxg7 Kxg7 De5 Kh6 Te1
>T13+ 01:28:30 -0,87 Dd5 Dh5 Te7 Sg4 Lxd4 Sf6 Lxf6 Txd5 exd5 Txg6 hxg6 Lxg6
>T13 02:00:00 -0,16 Dd5 Dh5 Te7 b3 Tc7 Sg4 Le7 De5 Dxe5 dxe5 Tac8 Sf6 Lxf6
>exf6 Sd5
>
>Aristarch 4.4 UCI 86 MB:
>T2 00:00 0,21 Lxa4 b3
>T3 00:00 0,36 Lxa4 b3 Lb5
>T4 00:00 0,25 Lxa4 b3 Lb5 Dg4
>T5 00:00 0,53 Lxa4 b3 Lb5 Dg4 Tc8
>T6 00:00 0,31 Lxa4 b3 Lc6 Dg4 Tc8 Tc1
>T7 00:00 0,37 Lxa4 b3 Lb5 Dg4 Lh4 Th3 g5
>T8 00:01 0,30 Lxa4 b3 Lc6 Dg4 Ld5 h3 Tc8 Te1
>T9 00:04 0,47 Lxa4 b3 Lb5 Dg4 Sc6 Lc2 Tc8 Le4 Sxd4
>T10 00:08 0,45 Lxa4 b3 Lb5 Dh5 De7 Dg4 Sc6 Df4 Tad8 Lc2
>T11 00:31 0,47 Lxa4 b3 Lb5 Dh5 Dc7 Le4 Tad8 Lf4 Lg7 Dg4 Tc8
>T12 02:50 0,50 Lxa4 b3 Lc6
>T13 10:46 0,37 Lxa4 b3
>T14 26:40 0,07 Lxa4 b3 Lb5 Dh5
>T15 01:29:04 -0,13 Lxa4 b3 Lc6
>
>So no result by Aristarch and a subperfect solution by Yace.
>
>What is the opinion of your favorite program?
>
>TL
After Bxa4, my Spider doesn't like the immediate Bxg6.
05 0:00:00 + 0.57 C6xA4 B2-B3 A4-B5 E2-G4 A8-C8
06 0:00:00 + 0.38 C6xA4 B2-B3 A4-B5 E2-D2 B4-D5 G3-F3
07 0:00:00 + 0.51 C6xA4 B2-B3 A4-B5 E2-G4 A8-C8 B1-E4 D8-E7
08 0:00:01 + 0.34 C6xA4 B2-B3 A4-B5 E2-G4 B4-D5 B1-E4 D8-D6 G4-H5
09 0:00:05 + 0.51 C6xA4 B2-B3 A4-B5 E2-G4 B4-D5 B1-E4 D8-D6 E5-C4 D6-B4
10 0:00:20 + 0.15 C6xA4 B1xG6 F7xG6 E5xG6 D8-C7 G6-E5 G8-H8 B2-B3 F6xE5
D4xE5 A4-B5 E2-H5 E8-G8 D1-C1
10 0:00:36 - 0.24 C6xA4 B1xG6 F7xG6 E5xG6 D8-C7 B2-B3 A4-B5 E2-H5 F6-G7
H6xG7 C7xG7 G6-E5
11 0:01:04 - 0.58 C6xA4 B1xG6 F7xG6 E5xG6 F6-G7 G6-F4 D8-F6 H6xG7 F6xF4
G7-H6 F4xG3 H2xG3 A4xD1 E2xD1 A8-C8
0:02:13 - 0.55 A8-C8 E2-H5 F6xE5 D4xE5 D8-C7 B2-B3 E8-D8 D1xD8 C8xD8
H5-E2 B4-D5 F2-F4 B7-B5
0:02:55 - 0.35 F6-G7 H6xG7 G8xG7 E2-D2 D8-E7 B2-B3 A8-C8 G3-H3 H7-H5
D1-C1 F7-F6
(AMD 2000 XP)
Martin
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