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Subject: Re: a simple test position that is hard for Shredder and hiarcs7.32

Author: Ernst Walet

Date: 01:40:28 01/05/02

Go up one level in this thread


On a Celeron 1200 Gandalf5 needs 13 seconds to avoid Nxb5.

Ernst.

00:00:01.3	-3,12	5	67484	Qxb5 g3 gxf3 gxf2+ Kxf2 Qc2+ Ne2 Qxd1 Qxc4
00:00:01.3	-3,10	5	69715	Nxb5
00:00:01.3	0,67	5	95218	Nxb5 Qc2 Qxf7 Qxd1+ Kh2 Qe1 Qxc4 Qxf2
00:00:02.3	0,27	6	167668	Nxb5 Qc2 Qxf7 Qxd1+ Kh2 Qe1 Qxc4 Qxf2
00:00:02.4	0,00	6	192758	Nxb5 g3 gxf3 gxf2+ Kxf2 Qc2+ Kg3 Qg6+ Kh3 Qh6+ Kg3 Qg6+
00:00:03.5	-0,40	7	439036	Nxb5 g3 gxf3 Rf5 Qxc4 Rxf3 Kf1 Rxf2+ Kg1
00:00:09.5	-0,89	8	1956931	Nxb5 g3 gxf3 Rf5 Qxc4 Rxf3 Kf1 Rxf2+ Kg1
00:00:10.5	-1,40	8	2036496	Nxb5 g3 gxf3 Rf5 Qxc4 Rxf3 Kf1 Rxf2+ Kg1
00:00:11.7	-2,27	8	2317422	Nxb5 Rf5 Qxc4 Qh5 Qc2 g3 gxf3 gxf2+ Qxf2 Rg5+ Kf1
Rxb5
00:00:13.0	-2,25	8	2669236	Re1
00:00:26.9	-0,57	8	5852890	Re1 Qf5 Qe4 fxg2 Kxg2 Bf8 Nxb5 Bxb4 Re3 Kg8 Qe8+ Kh7
00:00:37.4	-0,55	8	8076138	Ne4
00:00:47.9	-0,54	8	10399387	Ne4 Rf5 Qb7 Rf4 Re1 Qh5 g3 Rf5
00:01:04.3	-0,52	8	14131002	g3
00:01:04.4	-0,38	8	14195953	g3 Rf5 Qb7 Qe8 d5 Re5 Kf1 Rh5
00:01:08.9	-0,68	9	15085312	g3 Rf5 Qb7 Qe8 d5 Re5 Kf1 Rh5
00:01:09.1	-0,92	9	15307324	g3 Rf5 Qa8 Rh5 Qe4 Qxe4 Nxe4 Rd5 Nc3 Rxd4 Rxd4 Bxd4
Nxb5
00:01:11.4	-0,91	9	15775598	Ne4
00:01:34.6	-0,64	9	20856032	Ne4 Rf4 Ng5+ Kh6 Ne6 Rf5 Qe4 fxg2 d5 Rf3 Qxg6+ Kxg6
Nxg7 Kxg7 Kxg2
00:01:41.6	-0,62	9	22565882	Re1
00:01:56.8	-0,49	9	26176940	Re1 fxg2 Kxg2 Qf6 Qh5+ Bh6 Ne4 Qf3+ Kg1 Rf5 Qh4 Qh3
Nf6+ Kg6 Qxg4+ Qxg4+ Nxg4



On January 04, 2002 at 06:57:53, Uri Blass wrote:

>How much time do programs need to avoid 74.Nxb5
>Most programs need few seconds when
>Hiarcs7.32(48 Mbytes hash) needs almost 10 minutes on p800
>
>Shredder6 could not avoid Nxb5 even in 112 seconds
>based on the pgn of it's games against tiger aggresive.
>
>Shredder 6 - Gambit Tiger 2.0
>[D]8/5rbk/6q1/1p1Q4/1PpP2p1/2N2p2/5PP1/3R2K1 w - - 0 1
>
>Analysis by Hiarcs 7.32:
>
>74.Nxb5 fxg2 75.Kxg2
>  +-  (1.60)   Depth: 1   00:00:00
>74.Nxb5 fxg2
>  ±  (1.23)   Depth: 2/10   00:00:00
>74.Nxb5 fxg2 75.Qxg2
>  ±  (0.76)   Depth: 2/10   00:00:00
>74.Nxb5 fxg2
>  ±  (1.01)   Depth: 3/13   00:00:00
>74.Nxb5 fxg2
>  ±  (1.01)   Depth: 3/14   00:00:00
>74.Nxb5 fxg2 75.Qxc4 Qf5 76.Rd2
>  ±  (1.07)   Depth: 4/14   00:00:00
>74.Nxb5 fxg2
>  ±  (0.81)   Depth: 5/16   00:00:00  8kN
>74.Nxb5 fxg2
>  ±  (0.81)   Depth: 5/19   00:00:00  15kN
>74.Nxb5 Rf5
>  ²  (0.56)   Depth: 6/21   00:00:00  74kN
>74.Nxb5 Rf5 75.Qd7 Rh5 76.Nd6
>  =  (-0.01)   Depth: 6/23   00:00:01  100kN
>74.Nxb5 Rf5
>  ³  (-0.26)   Depth: 7/23   00:00:02  222kN
>74.Nxb5 Rf5 75.Qxc4 Qh5 76.Qc2 g3 77.gxf3 Qh2+
>  ³  (-0.38)   Depth: 7/25   00:00:02  279kN
>74.Nxb5 Rf5
>  ³  (-0.63)   Depth: 8/25   00:00:06  686kN
>74.Nxb5 Rf5
>  ³  (-0.63)   Depth: 8/27   00:00:08  837kN
>74.Nxb5 Rf5
>  ³  (-0.38)   Depth: 9/27   00:00:39  3940kN
>74.Nxb5 Rf5 75.Qxc4 Qh5 76.Qc2 g3 77.gxf3
>  ³  (-0.38)   Depth: 9/29   00:00:43  4378kN
>74.Nxb5 Rf5
>  ³  (-0.63)   Depth: 10/29   00:01:20  8215kN
>74.Nxb5 Rf5 75.Qxc4 Qh5 76.Qc7 g3 77.Qxg3 Rg5 78.Nc3 Rxg3 79.fxg3
>  -+  (-1.59)   Depth: 10/30   00:02:50  17774kN
>74.Re1 fxg2 75.Ne4 Rf5 76.Qb7 Kg8 77.Kxg2 Bxd4 78.Rd1 Bg7 79.Nd6 Rf3 80.Nxb5
>  µ  (-0.88)   Depth: 10/30   00:09:45  59913kN
>74.Ne4 Rf5 75.Qd7 Rf4 76.Ng3 Qf7 77.Qxf7 Rxf7 78.Ne4 Rf4 79.Ng5+ Kg8 80.Ne6 Re4
>81.Nxg7 Kxg7
>  ³  (-0.66)   Depth: 10/30   00:15:51  94551kN
>
>(Blass, Tel-aviv 04.01.2002)
>
>Uri



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