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Subject: Re: Junior 4.6 and the null move technique

Author: Robert Hyatt

Date: 06:16:29 03/19/98

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On March 19, 1998 at 02:24:55, Christophe Theron wrote:

>On March 18, 1998 at 22:25:24, Robert Hyatt wrote:
>
>>here's crafty running on my notebook, default (small) hash and all:
>>
>>              depth   time  score   variation (1)
>>                1     0.01  -4.98   1. Ke3
>>                1->   0.01  -4.98   1. Ke3
>>                2     0.02  -5.14   1. Ke3 Re6+ 2. Kf4
>>                2     0.03  -5.09   1. Rf4 Re6
>>                2->   0.03  -5.09   1. Rf4 Re6
>>                3     0.04  -4.95   1. Rf4 Re6 2. Kg3
>>                3->   0.05  -4.95   1. Rf4 Re6 2. Kg3
>>                4     0.06     --   1. Rf4
>>                4     0.06  -5.37   1. Rf4 Rg2+ 2. Kf1 Rd2 3. Rf2 Rxf2+
>>                                    4. Kxf2
>>                4     0.08     ++   1. Rd1+!!
>>                4     0.08  -5.06   1. Rd1+ Rg1 2. Rd8 Rg2+ 3. Ke3 Kg1
>>                4->   0.08  -5.06   1. Rd1+ Rg1 2. Rd8 Rg2+ 3. Ke3 Kg1
>>                5     0.10     ++   1. Rd1+!!
>>                5     0.11  -4.48   1. Rd1+ Rg1 2. Rd6 Ra1 3. Rg6 Ra3 4.
>>                                    Rg8
>>                5->   0.12  -4.48   1. Rd1+ Rg1 2. Rd6 Ra1 3. Rg6 Ra3 4.
>>                                    Rg8
>>                6     0.14  -4.64   1. Rd1+ Rg1 2. Rd6 Ra1 3. Rg6 a5 4.
>>                                    bxa5 Rxa5 5. Ke3
>>                6->   0.15  -4.64   1. Rd1+ Rg1 2. Rd6 Ra1 3. Rg6 a5 4.
>>                                    bxa5 Rxa5 5. Ke3
>>                7     0.22  -4.61   1. Rd1+ Rg1 2. Rd6 Ra1 3. Re6 Ra2+
>>                                    4. Kf3 Ra3+ 5. Ke4 Ra2
>>                7->   0.23  -4.61   1. Rd1+ Rg1 2. Rd6 Ra1 3. Re6 Ra2+
>>                                    4. Kf3 Ra3+ 5. Ke4 Ra2
>>                8     0.30  -4.48   1. Rd1+ Rg1 2. Rd6 Ra1 3. Re6 Ra2+
>>                                    4. Kf3 Ra3+ 5. Ke4 Ra1 6. Rf6
>>                8->   0.43  -4.48   1. Rd1+ Rg1 2. Rd6 Ra1 3. Re6 Ra2+
>>                                    4. Kf3 Ra3+ 5. Ke4 Ra1 6. Rf6
>>                9     0.66     ++   1. Rd1+!!
>>                9     0.68  Mat07   1. Rd1+ Rg1 2. Rf1 a5 3. bxa5 b4 4.
>>                                    a6 Rxf1+ 5. Kxf1 b3 6. a7 b2 7.
>>a8=Q#
>>                9->   0.73  Mat07   1. Rd1+ Rg1 2. Rf1 a5 3. bxa5 b4 4.
>>                                    a6 Rxf1+ 5. Kxf1 b3 6. a7 b2 7.
>>a8=Q#
>>              time:  0.74  cpu:83%  mat:-2  n:51447  nps:10000
>
>If Crafty does only 10000 nps on your notebook, this computer is quite
>slow. So Crafty is probably the best program so far on this position,
>doing better than Genius.
>
>
>    Christophe


ignore the nps.  If I don't use at least 1 second of time, that number
is
grossly wrong.  Note I searched 51K nodes in .74 seconds.  This machine
is
a pentium/MMX 233mhz with SDRAM (Gateway Solo 9100).

It would play Rd1 after .08 seconds... but it saw the mate in about 3/4
seconds...



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