Author: Uri Blass
Date: 12:39:19 10/25/01
Go up one level in this thread
On October 25, 2001 at 15:25:30, Dann Corbit wrote:
>On October 25, 2001 at 11:41:28, Uri Blass wrote:
>
>>How much time does your program need to avoid Nxg3?
>>
>>Here is Junior7's analysis on p200 after some learning
>>It has no problem to avoid Ng3 after learning 18...Nxg3 19.hxg3 Bxg3 20.f4 Qh4
>>21.Rf3 Qh2+ 22.Kf1.
>>
>>In the game of the match that a link for it is posted elsewhere
>>Shredder5.32 could not avoid 18...Nxg3 and lost against Fritz7
>>
>>
>>New game - Junior 7
>>[D]1r3rk1/pbbnq1pp/1p6/PPpp1p2/3Pn3/3NNPP1/2Q1P1BP/R1B2RK1 b - - 0 1
>
>Yace:
>
>title "King Safety (Uri Blass 10/25/01 @11:41:28)"
>Stored 8 learned positions into hash table
>solution Nd6
>usetime = 998.00, mintime = 998.00 maxtime = 998.00 tl 998.00 ml 0
> 196 0.003 -1.19 1t 1...Bxg3 2.fxe4 dxe4 3.Nxc5 bxc5 4.hxg3 cxd4
> {-190}
> 266 0.006 -0.84 1t 1...Nxg3 2.hxg3 Bxg3 {-180}
> 714 0.008 0.18 1t 1...f4 2.Nxd5 Bxd5 3.fxe4 Bxe4 4.Bxe4 Qxe4 {0}
> 861 0.010 0.20 1t 1...Nd6 2.axb6 Bxb6 3.dxc5 Nxc5 {0}
> 894 0.010 0.20 1. 1...Nd6 2.axb6 Bxb6 3.dxc5 Nxc5 {0}
> 1134 0.011 0.09 2t 1...Nd6 2.Bd2 Nxb5 3.axb6 {0}
> 1179 0.012 0.18 2t+ 1...f4 2.Nxd5 Bxd5H 3.fxe4H Bxe4H 4.Bxe4H Qxe4H
> {0}
> 1223 0.012 0.18 2t 1...f4 2.Nxd5 Bxd5H 3.fxe4H Bxe4H 4.Bxe4H Qxe4H
> {0}
> 1458 0.014 0.18 2. 1...f4 2.Nxd5 Bxd5 3.fxe4 Bxe4 4.Bxe4 Qxe4 {0}
> 6694 0.066 0.18 3t 1...f4 2.Nxd5 Bxd5 3.fxe4H Bxe4H 4.Bxe4H Qxe4H
> {0}
> 9101 0.071 0.18 3. 1...f4 2.Nxd5 Bxd5 3.fxe4 Bxe4 4.Bxe4 Qxe4 {0}
> 17511 0.101 0.06 4t 1...f4 2.a6 Ba8 3.Nxd5 {-80}
> 33406 0.155 0.06 4. 1...f4 2.a6 Ba8 3.Nxd5 {-80}
> 43020 0.182 -0.34 5-- 1...f4 2.gxf4 Bxf4 3.fxe4 dxe4 {-260}
> 50111 0.206 -1.12 5t 1...f4 2.gxf4 Nd6 3.dxc5 Nxb5 4.cxb6 {-160}
> 56777 0.226 -1.11 5t+ 1...Nd6 2.a6 Ba8 3.Bd2
> 114781 0.447 0.11 5t 1...Nd6 2.f4 Nxb5 3.Nxd5 Qd6H 4.Be3H {0}
> 143375 0.527 0.11 5. 1...Nd6 2.f4 Nxb5 3.Nxd5 Qd6 4.Be3 {0}
> 345034 1.228 -0.12 6t 1...Nd6 2.dxc5 Nxb5 3.axb6 axb6 4.Qb3 Nd4
> 5.Nxd5 Qxe2 {0}
> 1020439 3.535 -0.12 6. 1...Nd6 2.dxc5 Nxb5 3.axb6 axb6 4.Qb3 Nd4
> 5.Nxd5 Qxe2 {0}
> 1363286 4.644 -0.39 7t 1...Nd6 2.dxc5 Nxb5 3.Qb2 f4 4.axb6 axb6 5.gxf4
> {-80}
> 2968525 9.824 -0.39 7. 1...Nd6 2.dxc5 Nxb5 3.Qb2 f4 4.axb6 axb6 5.gxf4
> {-80}
> 3855310 12.615 -0.72 8t 1...Nd6 2.dxc5 bxc5 3.Nxc5 Nxc5 4.Qxc5 Rfc8
> 5.Qd4 Nxb5 6.Nxf5 {-80}
> 9808086 33.855 -0.72 8. 1...Nd6 2.dxc5 bxc5 3.Nxc5 Nxc5 4.Qxc5 Rfc8
> 5.Qd4 Nxb5 6.Nxf5 {-80}
> 13233369 46.495 -0.65 9t 1...Nd6 2.dxc5 bxc5 3.Nxc5 Nxc5 4.Qxc5 Rfc8
> 5.Qd4 Nxb5 6.Nxf5 Qe5 {-80}
> 24515539 1:25.0 -0.65 9. 1...Nd6 2.dxc5 bxc5 3.Nxc5 Nxc5 4.Qxc5 Rfc8
> 5.Qd4 Nxb5 6.Nxf5 Qe5 {-80}
> 36989399 2:12.5 -0.58 10t 1...Nd6 2.dxc5 bxc5 3.Nxc5 Nxc5 4.Qxc5 Rfc8
> 5.Qb4 Ba8 6.Qd4 Rxb5 7.Qxa7 {-80}
> 67274469 4:01.8 -0.58 10. 1...Nd6 2.dxc5 bxc5 3.Nxc5 Nxc5 4.Qxc5 Rfc8
> 5.Qb4 Ba8 6.Qd4 Rxb5 7.Qxa7 {-80}
> 101382720 6:17.0 -0.53 11t 1...Nd6 2.dxc5 bxc5 3.Nxc5 Nxc5 4.Qxc5 Rfc8
> 5.Qd4 Nxb5 6.Nxf5 Qe5 7.Qxe5 Bxe5 {-80}
>[snip]
Yace has no problem to solve it and I guess that the same is for Fritz and
Crafty but Junior7 has big problems and the same is probably also true for
shredder that lost the game because of 18...Nxg3
The hardware for Junior7 is only p200 but even after 3 hours Junior has no idea
that 18...Nxg3 is wrong because it overestimate white king sefety's problems.
Usually king safety test positions are positions when the sacrifice is correct
and this is the reason that I chose position when the sacrifice is wrong.
New game - Junior 7
[D]1r3rk1/pbbnq1pp/1p6/PPpp1p2/3Pn3/3NNPP1/2Q1P1BP/R1B2RK1 b - - 0 1
Analysis by Junior 7:
18...Nf2 19.Nxf2 f4
+- (2.14) Depth: 3 00:00:01
18...Nd6 19.a6 Ba8 20.dxc5
² (0.64) Depth: 3 00:00:01
18...Nxg3 19.hxg3 Bxg3
² (0.43) Depth: 3 00:00:01
18...Ng5 19.a6 Ba8
² (0.37) Depth: 3 00:00:01
18...Ng5 19.axb6 Bxb6 20.dxc5 Nxc5 21.Nxc5 Bxc5
² (0.35) Depth: 6 00:00:01 9kN
18...Ng5 19.axb6 axb6 20.Ra7 c4 21.Nf2 Qe6
± (0.79) Depth: 9 00:00:02 233kN
18...Nxg3!
= (0.05) Depth: 9 00:00:03 356kN
18...Nxg3! 19.hxg3 Bxg3 20.dxc5 bxc5 21.b6 Qh4 22.Qb2 axb6
= (-0.01) Depth: 9 00:00:04 512kN
18...Nxg3 19.hxg3 Bxg3 20.Bh3 Qh4 21.Kg2 c4 22.Nb2 g6 23.Rh1
= (-0.03) Depth: 12 00:00:15 1889kN
18...Nxg3 19.hxg3 Bxg3 20.Bh3 Qh4 21.Kg2 c4 22.Nb2 Bd6 23.Rh1 Qg3+ 24.Kf1 g6
25.Bd2
= (0.09) Depth: 14 00:02:15 16274kN
18...Nxg3 19.hxg3 Bxg3 20.Bh3 Qh4 21.Kg2 c4 22.Nb2 Bf4 23.Nxf5 Rxf5 24.Bxf4 Rxf4
25.Bxd7 Qg5+ 26.Kh2 Rh4+ 27.Bh3 Rxd4
= (0.23) Depth: 15 00:08:02 48911kN
18...Nxg3 19.hxg3 Bxg3 20.Bh3 Qh4 21.Kg2 c4 22.Nb2 Bc7 23.Rh1 Qg3+ 24.Kf1 g6
25.a6 Ba8 26.Bd2
² (0.26) Depth: 16 00:21:17 132489kN
18...Nxg3 19.hxg3 Bxg3 20.Bh3 Qh4 21.Kg2 c4 22.Nb2 Bd6 23.Rh1 Qg3+ 24.Kf1 g6
25.Nbxc4 dxc4 26.Qxc4+ Kh8 27.Qe6
= (0.24) Depth: 17 00:56:58 348264kN
18...Nxg3 19.hxg3 Bxg3 20.Bh3 Qh4 21.Kg2 c4 22.Nf2 g6 23.axb6 axb6 24.Ra7 Rfe8
25.Bd2
² (0.26) Depth: 18 02:39:16 1030918kN
Uri
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