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Subject: Re: fairly tough position

Author: Stan Arts

Date: 02:09:35 12/29/04

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On December 28, 2004 at 23:38:01, Will Singleton wrote:

>[d]r1r3k1/3bQpp1/pq1pp2p/4P3/5P2/1PpB4/P1P3PP/1K1R1R2 b - - 0 2
>
>from an ICC game today...  before trying it with your program, it might be
>interesting to see if you can intuit the theme.


As human on first glance I thought Qc5, followed by Qa3, and black Bb5.
Because then after Ka1 and a rook on b1 I thought white will be in trouble
after I capture the bishop on d3 (because of the passed pawn on c3, and rook
behind it) or I'll have an open a-file, where I didn't see a defence for
white.

Sounded good, but then after Neurosis didn't see it, I forced Qc5, and
ofcourse white plays Qxd6..oops. So my intuit isn't always so good. :|

So, here's what Neurosis sees instead. (P3-550 48mb hash.)

Qa5, with a small plus. But that plus will probably grow with more time. On
depth 13 it's pv shows the c3 pawn can become dangerous.

Legal moves: 38   Static score: -1
Ply Score  Time     Nodes      Best move and expected line
------------------------------------------------------------
2   -107   0        617        Bc6 Qxd6
3   -102   0        886        Bc6 Qxd6 Ra8-b8
4   -9     17       7200       Bc6 exd6 Ra7 Qh4
5   -9     55       25962      Bc6 exd6 Ra7 Qh4 Bxg2
6   -12    143      76357      Bc6 exd6 Ra7 Qh4 Bxg2 Rg1
7   -7     374      195337     Bc6 exd6 Ra7 Qh4 Rd7 Bc4 Bxg2
8   -15    1269     720623     Bc6 exd6 Ra7 Qh4 Bxg2 Qf2 Qxf2 Rxf2
9   3      4927     2882714    Bc6 Qxd6 Rd8 Qe7 Bxg2 Rg1 Bf3 Rd1-f1 a5
10  -2     13221    7670664    Bc6 Qxd6 Rd8 Qe7 Bxg2 Rg1 Qf2 Rd1-e1 a5 Rd1
11  4      54558    31988886   Bc6 f5 Ra7 Qxd6 Rd7 Qa3 Bxg2 fxe6 Qxe6 Rg1
11  5      91946    51155432   Qa5 < + > Qxd6 Rc5 Ka1 Rd5 Rb1 Rxd6 exd6
11  8      99015    55130604   Qa5 Ka1 Rc5 b4 Qxb4 Rb1 Qa4 Qxd6 Rc5-c8 Rb7 Rd8
12  5      147206   83229022   Qa5 Ka1 Rc5 b4 Qxb4 Rb1 Qa4 Qxd6 Ra5 Rb8+ Rxb8
Qxb8+ Be8
13  14     318541   193542377  Qa5 Ka1 Bb5 Qxd6 Rd8 Qe7 Bxd3 Rxd3 Rxd3 cxd3 c2
Kb2 Qd2
Total nodes:219355110 n/sec:61000  (q-nodes:29% max depth:35)

Greetings
Stan



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