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Subject: Re: a mate to solve (GLC2.15c -- 5 minutes)

Author: Tim Foden

Date: 14:35:33 10/10/01

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On October 10, 2001 at 15:54:52, Dann Corbit wrote:

>On October 10, 2001 at 15:31:17, Dann Corbit wrote:
>
>>On October 10, 2001 at 09:23:21, Tim Foden wrote:
>>

On my 920MHz Duron...

>>> 16   7:56 +Mate10 388591k  Rg3 2. Kc5 h3 3. Kc6 h2 4. Rd1 g1=Q 5. Rd5+ Ke4 6.
>>>                              Rb5 Rxb5 7. Kxb5 Qc1 8. Kb4 Qc2 9. b8=Q Rb3+ 10.
>>>                              Ka4 Qa2#
>>> 17   9:12      -- 455126k  Rg3     (a=320.98 b=321.00 e=320.98)
>>> 17  12:39      ++ 625746k  Rg3     (a=-321.00 b=320.98 e=320.98)
>>> 17  12:49   0/28           Rg3    >exit
>>> local:  t=12:51  nps=823134.8  n=634776023 (28.9% / 71.1%)  fh=94.3%
>>> total:  t=12:51  nps=823134.8  n=634776023  draws=786622
>>> trans:  probes=157466652  hits=50262459 (31.92%)  draft=39200352 (24.89%)
>>> tcuts:  exact=26821 (0.02%)  upper=27122632 (17.22%)  lower=4408899 (2.80%)
>>> tstor:  exact=21775 (0.03%)  upper=66184235 (79.86%)  lower=16671234 (20.12%)
>>> ext:  check=88835236  recap=173709  ppush=1582950  1rep=6413384  thrt=0
>>> q-moves:  gen=15390981  tested=11156920  made/un=4609839  max-dep=9
>>> max eval diff:  part-1=4.798  part-2=1.402

On your 950MHz Athlon...

> 16   6:31 +Mate10 363016k  Rg3 2. Kc5 h3 3. Kc6 h2 4. Rd1 g1=Q 5. Rd5+ Ke4 6.
>                              Rb5 Rxb5 7. Kxb5 Qc1 8. Kb4 Qc2 9. b8=Q Rb3+ 10.
>                              Ka4 Qa2#
> 17   7:26      -- 419750k  Rg3     (a=320.98 b=321.00 e=320.98)
> 17  10:09      ++ 572042k  Rg3     (a=-321.00 b=320.98 e=320.98)
> local:  t=16:39  nps=902743.0  n=901845641 (30.1% / 69.9%)  fh=93.5%
> total:  t=16:39  nps=902743.0  n=901845641  draws=1129934
> trans:  probes=234253343  hits=78907662 (33.68%)  draft=61531618 (26.27%)
> tcuts:  exact=58849 (0.03%)  upper=40671501 (17.36%)  lower=6509021 (2.78%)
> tstor:  exact=38983 (0.03%)  upper=91258254 (79.15%)  lower=23998614 (20.81%)
> ext:  check=121469999  recap=315717  ppush=2515585  1rep=7944271  thrt=0
> q-moves:  gen=43011618  tested=32110614  made/un=15682760  max-dep=9
> max eval diff:  part-1=5.794  part-2=1.402

At 16 ply:

96MB Hash = 388591k Nodes, 192MB hash 363016k Nodes...

So 192MB gives 6.6% fewer nodes than 96MB.

The rest of this speedup (total speed up around 22%) is simply due to the faster
MHz and larger caches of the Athlon.

Cheers, Tim.



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