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Subject: Re: Hard position for Rybka

Author: Aaron Gordon

Date: 23:24:22 12/13/05

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On December 14, 2005 at 01:28:56, Aaron Gordon wrote:

>It took a while, but Rybka found it. My system is an Athlon 64 (1mb L2, socket
>939) running 2.85GHz with Windows 64 using the 64 bit Rybka 1.0 beta binary.
>
>00:00:00.5	1.28	8	55596	Kf7 Nd6+ Kf6 Nb5+ Kg5 Nxd4 Qxd4 Ra6
>00:00:00.6	1.84	8	89807	Kf5 Ng3+ Kg5 Rf8 Bf6 Ne4+ Kh4
>00:00:00.8	1.84	9	133527	Kf5 Ng3+ Kg5 Rf8 Bf6 Ne4+ Kh4 Nxf6
>00:00:01.1	1.84	10	237021	Kf5 Ng3+ Kg5 Rf8 Bf6 Ne4+ Kh4 Ra8 a2 Nxf6
>00:00:02.0	2.05	11	484587	Kf5 Ng3+ Kg5 Rf8 Bf6 Ne4+ Kh4 Ra8 a2 Nxf6
>00:00:04.6	2.39	12	1158074	Kf5 Ng3+ Kg5 Rf8 Bf6 Ne4+ Kh4 Ra8 a2 Nxf6
>00:00:09.3	2.46	13	2431020	Kf5 Ng3+ Kg5 Rf8 Bf6 Rc5+ Kg6 Rb5 Qc2 Ra5
>00:00:17.8	2.54	14	4820217	Kf5 Ng3+ Kg5 Rf8 Bf6 Rc5+ Kg6 Rb5 Qc2 Ra5
>00:00:34.1	2.49	15	9176641	Kf5 Ng3+ Kg5 Rf8 Bf6 Rc5+ Kg6 Rb5 Qc2 Ra5
>00:01:07.2	2.54	16	18060509 Kf5 Ng3+ Kg5 Rf8 Bf6 Rc5+ Kg6 Rb5 Qc2 Ra5
>00:02:04.7	2.54	17	33020183 Kf5 Ng3+ Kg5 Rf8 Bf6 Rc5+ Kg6 Rb5 Qd4 Ra5
>00:03:03.0	3.97	17	54036985 Bf6 Ra8 Qb7 Raa6 a2 Re6 Qb2 c5 a1Q Rxa1
>00:03:40.3	3.97	18	68605640 Bf6 Ra8 Qb7 Raa6 a2 Re6 Qb2 Ng3 a1Q Rxa1

I forgot to add that the Athlon 64 used 512mb hash. Here is a run from an Athlon
(Thunderbird core) 1.4GHz with 256mb hash. Ouch.. :P

00:00:01.1	1.28	8	55240	Kf7 Nd6+ Kf6 Nb5+ Kg5 Nxd4 Qxd4 Ra6
00:00:03.0	1.28	9	149988	Kf7 Nd6+ Kf6 Nb5+ Kg5 Nxd4 Qxd4 Ra6 Qe4+ Kg3
00:00:05.7	1.10	10	294977	Kf7 Nd6+ Kf6 Nb5+ Kg5 Nxd4 Qxd4 Ra6 Qe4+ Kg3 Qd3+ f3
00:00:07.5	1.74	10	409758	Kf5 Ng3+ Kg5 Rf8 Bf6 Ne4+ Kg6 Nxf6 gxf6 Rg8+ Kf5 Rc5+
Ke6 Ra5
00:00:11.2	1.96	11	660673	Kf5 Ng3+ Kg5 Rf8 Bf6 Rc5+ Kg6 Ra5 Qb7+ Kh2 Be7
00:00:20.3	2.24	12	1252794	Kf5 Ng3+ Kg5 Rf8 Bf6 Ne4+ Kg6 Nxf6 Qb7 Rc8 gxf6 Rc7
00:00:39.9	2.46	13	2587008	Kf5 Ng3+ Kg5 Rf8 Bf6 Rc5+ Kg6 Rb5 Qc2 Ra5 a2 Rfa8 a1Q
00:01:18.8	2.54	14	5321984	Kf5 Ng3+ Kg5 Rf8 Bf6 Rc5+ Kg6 Rb5 Qc2 Ra5 Qxc4 Rfa8
Be7
00:02:20.5	2.49	15	9517682	Kf5 Ng3+ Kg5 Rf8 Bf6 Rc5+ Kg6 Rb5 Qc2 Ra5 Qxc4 Rfa8
Be7 R8a6+
00:04:47.0	2.54	16	19068751 Kf5 Ng3+ Kg5 Rf8 Bf6 Rc5+ Kg6 Rb5 Qc2 Ra5 Qxc4 Rfa8
Be7 R8a6+
00:09:04.7	2.54	17	35017942 Kf5 Ng3+ Kg5 Rf8 Bf6 Rc5+ Kg6 Rb5 Qc2 Ra5 Qxc4 Rxf6+
Kxf6 Rxa3
00:13:10.2	3.97	17	57498973 Bf6 Ra8 Qb7 Raa6 a2 Re6 Kf5 Rxa2 Kxe6 f3 Qb1
00:16:28.4	3.97	18	75431596 Bf6 Ra8 Qb7 Raa6 a2 Re6 Kf5 Rxa2 Kxe6 f3 Qb1



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