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Subject: Re: Mate that every program will find.

Author: leonid

Date: 06:51:15 04/26/01

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On April 26, 2001 at 09:17:04, Tim Foden wrote:

>On April 26, 2001 at 08:00:06, leonid wrote:
>
>>Hello!
>>
>>This mate your program will see, probably, as too easy. Still it could the real
>>pleasure to see it at work.
>>
>>[D]5b1r/1Pq1Pk2/p7/4Q3/1R1PP1B1/4Kn1N/R2p2rB/1N3b1n b - -
>>
>>Please, say what was the result.
>
>Green Light Chess v2.14-pr8, 48Mb hash, 920MHz Duron says:
>
>Re2+   Mate in 10 after 5.31 secs, 7 ply.
>Bh6+   Mate in  9 after 8 mins 10 secs, 10 ply.
>
>Cheers, Tim.
>
>Analysis below:
>
>>anal
> Game stage: Opening
> Current eval: -3.26
> Ply  Time   Score   Nodes  Principal Variation
>  3   0.02   7.294    8514  Bh6+ Nf4 Nxe5 dxe5 d1=Q Bxd1 Rxa2
>  3   0.03   7.294   11108  Bh6+ Nf4 Nxe5 dxe5 d1=Q Bxd1 Rxa2
>  4   0.10      --   30946  Bh6+    (a=6.79 b=7.79 e=6.79)
>  4   0.25   6.735   80201  Bh6+ Nf4 Nxe5 dxe5 Rxh2 Nxd2 Bxf4+ Kxf4 Qxe7
>  4   0.26   6.735   83552  Bh6+ Nf4 Nxe5 dxe5 Rxh2 Nxd2 Bxf4+ Kxf4 Qxe7
>  5   0.55      --  244539  Bh6+    (a=6.24 b=7.24 e=6.24)
>  5   0.58      ++  250530  Bh6+    (a=-321.00 b=6.24 e=6.24)
>  5   0.60   6.243  264440  Bh6+ Bf4 Bxf4+ Qxf4+ Qxf4+ Kxf4 Rxg4+ Ke3 d1=Q b8=R
>                              Rxb8 Rxb8 Qxd4+ Kxf3 Bxh3
>  5   0.61   6.243  264524  Bh6+ Bf4 Bxf4+ Qxf4+ Qxf4+ Kxf4 Rxg4+ Ke3 d1=Q b8=R
>                              Rxb8 Rxb8 Qxd4+ Kxf3 Bxh3
>  6   0.66      ++  283057  Bh6+    (a=5.74 b=6.74 e=6.74)
>  6   1.24  10.981  536791  Bh6+ Bf4 Bxf4+ Qxf4+ Qxf4+ Kxf4 Rxg4+ Ke3 d1=Q Nf2
>                              Qc1+ Rd2 Nxd2 Nxg4 Nxb1+
>  6   1.59  10.981  731336  Bh6+ Bf4 Bxf4+ Qxf4+ Qxf4+ Kxf4 Rxg4+ Ke3 d1=Q Nf2
>                              Qc1+ Rd2 Nxd2 Nxg4 Nxb1+
>  7   2.41      ++ 1109395  Bh6+    (a=10.48 b=11.48 e=11.48)
>  7   3.79  12.544 1854215  Bh6+ Bf4 Bxf4+ Qxf4+ Qxf4+ Kxf4 Rxg4+ Ke3 d1=Q Ng5+
>                              Nxg5 e8=Q+ Rxe8 b8=Q Rxb8 Rxb8 Nxe4
>  7   5.31  Mate10 2751231  Re2+ Kxf3 Rxh3+ Bxh3 Rf2+ Kg4 d1=Q+ Kg5 Qxe7+ Qxe7+
>                              Bxe7+ Kh6 Rf6+ Kg5 Rf3+ Kg4 Rf2+ Re2 Qxe2# <ht>
>  7   6.01  Mate10 3254745  Re2+ Kxf3 Rxh3+ Bxh3 Rf2+ Kg4 d1=Q+ Kg5 Qxe7+ Qxe7+
>                              Bxe7+ Kh6 Rf6+ Kg5 Rf3+ Kg4 Rf2+ Re2 Qxe2# <ht>
>  8   7.40  Mate10 4291542  Re2+ Kxf3 Rxh3+ Bxh3 Rf2+ Kg4 d1=Q+ Kg5 Qxe7+ Qxe7+
>                              Bxe7+ Kh6 Rf6+ Kg5 Rf3+ Kg4 Rf2+ Re2 Qxe2#
>  8  11.98  Mate10 7737084  Re2+ Kxf3 Rxh3+ Bxh3 Rf2+ Kg4 d1=Q+ Kg5 Qxe7+ Qxe7+
>                              Bxe7+ Kh6 Rf6+ Kg5 Rf3+ Kg4 Rf2+ Re2 Qxe2#
>  9  14.64  Mate10 9841448  Re2+ Kxf3 Rxh3+ Bxh3 Rf2+ Kg4 d1=Q+ Kg5 Qxe7+ Qxe7+
>                              Bxe7+ Kh6 Rf6+ Kg5 Rf3+ Kg4 Rf2+ Re2 Qxe2# <ht>
>  9  46.64  Mate10  34559k  Re2+ Kxf3 Rxh3+ Bxh3 Rf2+ Kg4 d1=Q+ Kg5 Qxe7+ Qxe7+
>                              Bxe7+ Kh6 Rf6+ Kg5 Rf3+ Kg4 Rf2+ Re2 Qxe2# <ht>
> 10   1:03  Mate10  47961k  Re2+ Kxf3 Rxh3+ Bxh3 Rf2+ Kg4 d1=Q+ Kg5 Qxe7+ Qxe7+
>                              Bxe7+ Kh6 Rf6+ Kg5 Rf3+ Kg4 Rf2+ Re2 Qxe2# <ht>
> 10   8:10  Mate09 467947k  Bh6+ Bf4 Bxf4+ Qxf4+ Qxf4+ Kxf4 Rxg4+ Ke3 d1=Q
>                              e8=Q+ Rxe8 Ng5+ Ke7 Rd2 Qe1+ Re2 Qxe2# <ht>
> 10   9:36  Mate09 541168k  Bh6+ Bf4 Bxf4+ Qxf4+ Qxf4+ Kxf4 Rxg4+ Ke3 d1=Q
>                              e8=Q+ Rxe8 Ng5+ Ke7 Rd2 Qe1+ Re2 Qxe2# <ht>
> 11  10:35  Mate09 593620k  Bh6+ Bf4 Bxf4+ Qxf4+ Qxf4+ Kxf4 Rxg4+ Ke3 d1=Q
>                              e8=Q+ Rxe8 Ng5+ Ke7 Rd2 Qe1+ Re2 Qxe2# <ht>
> 11  14:10  Mate09 779064k  Bh6+ Bf4 Bxf4+ Qxf4+ Qxf4+ Kxf4 Rxg4+ Ke3 d1=Q
>                              e8=Q+ Rxe8 Ng5+ Ke7 Rd2 Qe1+ Re2 Qxe2# <ht>
> 12  15:31   0/52           Bh6+   >exit
> local:  t=15:33  nps=915578.6  n=854428905  (f=207172669  q=647256236)
> total:  t=15:33  nps=915578.6  n=854428905  draws=229947
> trans:  probes=111715232  hits=8854934 (7.93%)  draft=6120765 (5.48%)
> tcuts:  exact=247 (0.00%)  upper=3471636 (3.11%)  lower=2125501 (1.90%)
> tstor:  exact=822 (0.00%)  upper=40048822 (65.21%)  lower=21361853 (34.78%)
> ext:  check=108261961  recap=692515  ppush=197  1rep=3974347  thrt=0
> q-moves:  gen=2608113  tested=780071  made/un=364476  max-dep=12
> max eval diff:  part-1=3.544  part-2=2.535
>>

Once again impressive numbers! 915k. I looked above result for Chess Master and
its NPS is much closer to mine - 128k. Mine brute force was 191k on 600Mhz. I
don't know my selective search NPS. Not indicated in my description.

Cheers,
Leonid.



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