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

Author: Dann Corbit

Date: 14:57:33 01/04/02

Go up one level in this thread


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

CM8000:

Time	Depth	Score	Positions	Moves
0:00	2/5	0.46	15819		1. Nxb5 fxg2 2. Kxg2 Qf6 3. Qe4+
					Kg8
0:00	2/6	0.83	43927		1. Nxb5 fxg2 2. Qxc4 Qf5 3. Qd3
					Qxd3 4. Rxd3 Rb7
0:01	3/7	0.19	172873		1. Nxb5 g3 2. gxf3 Rf5 3. Qxc4
					Rxf3 4. Kg2 Rxf2+ 5. Kg1
0:04	3/8	-0.55	490922		1. Nxb5 Rf5 2. Qxc4 Qh5 3. Qc2
					g3 4. gxf3 gxf2+ 5. Qxf2 Rxb5
4:12	5/10	-0.23	31220846	1. Ne4 Re7 2. Ng3 c3 3. Qc5 c2
					4. Rc1 Rf7 5. Qxc2 Bxd4 6. Qe4
					Qxe4 7. Nxe4 fxg2 8. Kxg2



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