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Subject: Re: position

Author: Dieter Buerssner

Date: 06:08:48 06/09/02

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On June 09, 2002 at 01:00:30, Will Singleton wrote:

>On June 09, 2002 at 00:28:44, Peter Kappler wrote:
>
>>On June 08, 2002 at 23:47:41, Will Singleton wrote:
>>
>>>[D]4Q3/1q3ppk/2Nb4/1p4pb/2n5/2P4P/1P3PP1/R5K1 b - -
>>>
>>>Amateur 2 plays Qc7 at 70 sec.  The first amateur program who can beat this
>>>time, or find a better move, gets a copy of Hsu's new book, when available.
>>>Must be submitted by the author.
>>>
>>
>>Grok switches from Nxb2 to Bc5 after 50 seconds, and starts returning a
>>drawscore at ply 10.  Don't know if Bc5 is better than Qc7...
>>  8     11   14.411s    3262810  226knps  Nxb2 Ra8 g4 Ra7 Qb6 hxg4 Bg6 Qd7
>>  9     -1   50.322s   13361462  266knps  Bc5 Ra8 Qc7 Qh8+ Kg6 Rg8 f5 b4 Bd6 Rc8
>>  9     -1   80.095s   20862554  260knps  Bc5 Ra8 Qc7 Qh8+ Kg6 Rg8 f5 b4 Bd6 Rc8
>> 10      0  119.101s   32176831  270knps  Bc5 Ra8 Qc7 Qh8+ Kg6 Rg8 Bxf2+ Kxf2
>>Qf4+ Kg1 Qc1+ Kh2 Qf4+ <h2>
>>
>>Hardware: AMD 1.4 GHz
>>
>>-Peter
>
>You win.  I tested other engines on this, Yace, Pepeito, Leila, Beowulf, and
>Sjeng.  Nothing close to your result.

Strange. I think on your hardware, Yace should be faster. On my AMD K6-2 475,
Yace 0.99.56, default settings, 40M hash:

    105361   1.190   0.85  6-- 1...Nxb2 2. Ra8 Ba3
    116216   1.254   0.85  6t  1...Nxb2 2. Ra8 {200}
    212775   1.844   0.85  6.  1...Nxb2 2. Ra8 {200}
    366857   2.785   0.84  7t  1...Nxb2 2. Ra8 g4 3. Ra7 Qb6 4. hxg4 Bg6 {120}
    548738   3.769   0.84  7.  1...Nxb2 2. Ra8 g4 3. Ra7 Qb6 4. hxg4 Bg6 {120}
   1039554   6.646   0.95  8t  1...Nxb2 2. Ra8 g4 3. Ra7 Qb6 4. hxg4 Bxg4 5.
                               Rxf7 Nc4 {120}
   1440105   8.951   0.95  8.  1...Nxb2 2. Ra8 g4 3. Ra7 Qb6 4. hxg4 Bxg4 5.
                               Rxf7 Nc4 {120}
   2045749  12.794   0.55  9-- 1...Nxb2 2. Ra8 g4 3. hxg4 Bxg4 4. Ra7 Kg6 5.
                               Rxb7 Nc4 {-801}
   2782092  17.162   0.54  9t  1...Nxb2 2. Ra8 g4 3. hxg4 Bxg4H 4. Ra7H Qc8H
                               5. Qxf7H Qf8H 6. Qd5H {120}
   8115784  50.581   0.54  9.  1...Nxb2 2. Ra8 g4 3. hxg4 Bxg4 4. Ra7 Qc8 5.
                               Qxf7 Qf8 6. Qd5 {120}
  11512319  1:12.6   0.14 10-- 1...Nxb2 2. g4 Bg6 3. Ra8 Kh6 4. Ra7 Qxc6 5.
                               Qxc6 Be4 6. Qxe4 Nc4 {-811}
  12688502  1:20.9  -0.86 10-- 1...Nxb2 2. g4 Bg6 3. Ra8 Kh6 4. Ra7 Qxc6 5.
                               Qxc6 Be4 6. Qxe4 Nc4 {-811}
  16608588  1:47.6  -1.74 10t  1...Nxb2 2. g4 Bc5 3. gxh5 Na4 4. c4 Nc3 5. Ra8
                               Ne2+ 6. Kf1 Nf4 {-150}
  18656315  2:00.3  -1.73 10t+ 1...Qc7 2. Qe4+ Bg6 3. Ne5
  27721677  3:04.6   0.00 10t  1...Qc7 2. Ra7 Bh2+ 3. Kh1 Qf4 4. Ra8 Qc1+ 5.
                               Kxh2 Qf4+ 6. Kh1H Qxf2H 7. Qh8+H Kg6H 8. Ra6H
                               {HT} {-150}
  46660154  5:14.4   0.00 10.  1...Qc7 2. Ra7 Bh2+ 3. Kh1 Qf4 4. Ra8 Qc1+ 5.
                               Kxh2 Qf4+ 6. Kh1 Qxf2 7. Qh8+ Kg6 8. Ra6 {HT}
                               {-150}

So, 120 seconds. I would think that your hardware is at least 4 times faster.

Regards,
Dieter




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