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Subject: Re: Junior 4.6 and the null move technique

Author: Christophe Theron

Date: 23:24:55 03/18/98

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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



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