Computer Chess Club Archives


Search

Terms

Messages

Subject: Re: Interesting Position (Tactics and King Safety)

Author: Tony Werten

Date: 15:59:58 07/08/01

Go up one level in this thread


On July 08, 2001 at 15:26:00, Bas Hamstra wrote:

>Here is Tao's output:
>
>Hash 8 Mb
>PawnHash 4 Mb
>Hashing 524288 positions
>PHash 65536 records
>Evaluation learning 0
>Could not open Tao.bk for input
>Ok[Load qqqq.epd]
>Ok[analyze]
>TargetTime set[4750]
> 1. -87      0       290  e1g1 a5b4
> 2  -87      0       368  e1g1 a5b4
> 2. -87      0       715  e1g1 a5b4
> 3  -88      0      1196  e1g1 a5b4 d3b3
> 3  -79      0      2167  g3g4 f5h6 f3g5
> 3. -79      0      2539  g3g4 f5h6 f3g5
> 4  -69      0      6881  g3g4 f5h6 f3g5 g7g6
> 4. -69      0      7927  g3g4 f5h6 f3g5 g7g6
> 5 -113      0     22579  g3g4 f5h6 f3g5 g7g6 d3f3 a5b4
> 5  -70      1     50303  b4b5 c6a7 g3g4 c8c1 b2c1 f5h6
> 5. -70      1     52266  b4b5 c6a7 g3g4 c8c1 b2c1 f5h6
> 6  -59      1     87189  b4b5 c6a7 g3g4 c8c1 b2c1 f5h6 f3g5
> 6. -59      1     99395  b4b5 c6a7 g3g4 c8c1 b2c1 f5h6 f3g5
> 7  -60      3    249696  b4b5 a5a4 b5c6 b6b2 c1b1 b2a3 d3a3 e7a3 c6b7
> 7. -60      3    281129  b4b5 a5a4 b5c6 b6b2 c1b1 b2a3 d3a3 e7a3 c6b7
> 8  -57      8    721830  b4b5 c6a7 c1c8 f8c8 g3g4 f5h6 f3g5 g7g6
> 8. -57      9    792203  b4b5 c6a7 c1c8 f8c8 g3g4 f5h6 f3g5 g7g6
> 9  -66     20   1780125  b4b5 c6a7 a3a4 c8c1 b2c1 f8c8 e1g1 c8c4 d3d1
>                          e7b4
> 9. -66     22   2022178  b4b5 c6a7 a3a4 c8c1 b2c1 f8c8 e1g1 c8c4 d3d1
>    	                  e7b4
>10  -59     43   4231308  b4b5 c6a7 a3a4 e7b4 f3d2 c8c1 b2c1 a7c8 e1g1
>    	                  c8e7 c1b2 f8c8
>10. -59     48   4667668  b4b5 c6a7 a3a4 e7b4 f3d2 c8c1 b2c1 a7c8 e1g1
>  	                  c8e7 c1b2 f8c8
>11  -81     84   8311595  b4b5 c6a7 a3a4 e7b4 b2c3 b4c3 c1c3 c8c3 e1c3
>	                  f5g3 h1g1 g3h5 g1g4
>11  -38    217  21846803  g3g4 a5b4 g4f5 b4a3 b2c3 c6b4 d3d2 e6f5 e1g1
>                          g8h8 f3g5
>11. -38    222  22330210  g3g4 a5b4 g4f5 b4a3 b2c3 c6b4 d3d2 e6f5 e1g1
>           g8h8 f3g5
>12  -41    364  37064696  g3g4 a5b4 g4f5 b4a3 b2c3 c6b4 d3d2 e6f5 e1g1
>                          g8h8 f3g5 b4c6
>12. -41    384  39268573  g3g4 a5b4 g4f5 b4a3 b2c3 c6b4 d3d2 e6f5 e1g1
>  		          g8h8 f3g5 b4c6
>13  -13   1404 153508743  g3g4 e7b4 a3b4 c6b4 d3b1 f5e3 b2c3 e3g4 f3g5
> 	      	          f7f5 e5f6 g4f6 e1g1 g8h8 c3b4 a5b4
>13. -13   1448 157957945  g3g4 e7b4 a3b4 c6b4 d3b1 f5e3 b2c3 e3g4 f3g5
>		          f7f5 e5f6 g4f6 e1g1 g8h8 c3b4 a5b4
>14  -12   2736 300621807  g3g4 e7b4 a3b4 c6b4 d3d2 c8c1 b2c1 f5e3 g4g5
> 			  f8c8 e1f2 e3c4 d2d1 b6a6 c1d2 b4d3 f2g2 c4d2
>			  d1d2
>
>Ok[quit]
>
>No big scores after g4! Maybe we should consult Comet :-)

Well, at least somebody who agrees g4 should be answered with Bxb4 !

Tony

>
>
>Bas.
>
>
>
>On July 07, 2001 at 15:51:46, Peter McKenzie wrote:
>
>>[D]2r2rk1/1p2bppp/1qn1p3/p2pPn2/1P1P1P1P/P2Q1NP1/1B2N3/2R1K2R w K -
>>
>>This position was reached in a game on ICC, with LambChop black and a human
>>white.  LambChop just played a5, which allows the opponent to attack on the king
>>side with g4 Nh6 Ng5 g6 h5 and white is winning I think.
>>
>>I was a little surprised that it takes Chop 11ply to play g4 (initially it
>>preferred b5), and even after a 13ply search the score is still slightly
>>negative (0.2 in black's favour).
>>
>>So I'm wondering how other programs do here?
>>
>>I think that black has some chances to muddy the waters with sacrifices on b4 at
>>various points.  While I don't think these are any good, they do have some merit
>>and could push the horizon out a bit.
>>
>>Any suggestions of what sort of evaluation terms or extensions might help here
>>would be welcome :-)
>>
>>cheers,
>>Peter
>>
>>p.s. Now I see that there is another possible defence: g4 axb4 gxf5 bxa3, not
>>sure if this works but it's interesting.  The position after g4:
>>
>>[D]2r2rk1/1p2bppp/1qn1p3/p2pPn2/1P1P1PPP/P2Q1N2/1B2N3/2R1K2R b K -
>>
>>In this position, Chop needs 12ply to switch to axb4, score is +0.44.  I
>>wouldn't treat that score as gospel, but I think axb4 is a much better try than
>>Nh6.



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.