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Subject: Re: Analysis question for these 2 EPD positions

Author: Les Fernandez

Date: 23:51:43 01/08/05

Go up one level in this thread


On January 09, 2005 at 02:48:49, Uri Blass wrote:

>On January 09, 2005 at 02:42:44, Uri Blass wrote:
>
>>On January 09, 2005 at 00:45:33, Les Fernandez wrote:
>>
>>>Following are 2 positions that I would like analyzed so that I can compare the
>>>times it takes to solve these 2 positions on several differnet engines.  Can a
>>>few of you run, using different engines, these 2 positions and report the amount
>>>of time it takes to find the mate move along with the move?  After I get a few
>>>analyses and have had time to review them I will report back with my results.
>>>
>>>Position #1
>>>
>>>[D]1b3rk1/pp4pp/2p3n1/1P1p4/P2P2q1/R4NPb/3NBK2/3QR3 b - -
>>
>>Fruit2(fast) solve both positions at depth 4 in less than a second.
>>
>>New game,
>>1b3rk1/pp4pp/2p3n1/1P1p4/P2P2q1/R4NPb/3NBK2/3QR3 b - - 0 1
>>
>>Analysis by Fruit 2.0:
>>
>>1...Qxd4+ 2.Re3 Bd6 3.bxc6 bxc6
>>  =  (-0.08)   Depth: 1/10   00:00:00
>>1...Bxg3+ 2.Ke3 Qf4+ 3.Kd3 Bxe1 4.Qxe1
>>  ยต  (-0.98)   Depth: 1/10   00:00:00
>>1...Bxg3+ 2.Ke3 Qe6+ 3.Ne5 Bxe1 4.Qxe1 Nxe5 5.dxe5 Qxe5+ 6.Kd3
>>  -+  (-2.47)   Depth: 2/19   00:00:00
>>1...Qxg3+ 2.Ke3 Bf5 3.Bd3 Re8+ 4.Ne4 dxe4
>>  -+  (-2.77)   Depth: 2/19   00:00:00
>>1...Qxd4+ 2.Re3 Bxg3+ 3.Kg1 Qxe3+ 4.Kh1 Bxe1 5.Qxe1
>>  -+  (-7.13)   Depth: 2/19   00:00:00
>>1...Qxd4+ 2.Re3 Bxg3+ 3.Kg1 Qxe3+ 4.Kh1 Nf4 5.Bf1 Bxe1 6.Qxe1
>>  -+  (-7.43)   Depth: 3/19   00:00:00
>>1...Qxd4+ 2.Re3 Bxg3+ 3.Kg1 Qxe3+ 4.Kh1 Bg2+ 5.Kxg2 Qf2+ 6.Kh1 Rf5 7.Bf1 Rh5+
>>8.Bh3 Rxh3+ 9.Nh2 Rxh2#
>>  -+  (-#9)   Depth: 4/25   00:00:00
>>1...Qxd4+ 2.Re3 Bxg3+ 3.Kg1 Qxe3+ 4.Kh1 Bg2+ 5.Kxg2 Qf2+ 6.Kh1 Rf5 7.Bf1 Rh5+
>>8.Bh3 Rxh3+ 9.Nh2 Rxh2#
>>  -+  (-#9)   Depth: 5/25   00:00:00
>>1...Qxd4+ 2.Re3 Bxg3+ 3.Kg1 Qxe3+ 4.Kh1 Bg2+ 5.Kxg2 Qf2+ 6.Kh1 Rf5 7.Bf1 Rh5+
>>8.Bh3 Rxh3+ 9.Nh2 Rxh2#
>>  -+  (-#9)   Depth: 6/25   00:00:01  1505kN
>>1...Qxd4+ 2.Re3 Bxg3+ 3.Kg1 Qxe3+ 4.Kh1 Bg2+ 5.Kxg2 Qf2+ 6.Kh1 Rf5 7.Bf1 Rh5+
>>8.Bh3 Rxh3+ 9.Nh2 Rxh2#
>>  -+  (-#9)   Depth: 7/25   00:00:05  5391kN
>>
>>(, MyTown 09.01.2005)
>>
>>>
>>>Position #2
>>>
>>>[D]1b3rk1/pp4pp/2p3n1/1Pqp4/P2P4/R4NPb/3NBK2/3QR3 b - -
>>
>>New game,
>>1b3rk1/pp4pp/2p3n1/1Pqp4/P2P4/R4NPb/3NBK2/3QR3 b - - 0 1
>>
>>Analysis by Fruit 2.0:
>>
>>1...Qxa3 2.bxc6 bxc6
>>  -+  (-3.08)   Depth: 1/3   00:00:00
>>1...Qxa3 2.Qc2
>>  -+  (-3.02)   Depth: 2/12   00:00:00
>>1...Qxd4+ 2.Re3 Bxg3+ 3.Kg1 Qxe3+ 4.Kh1 Bxe1 5.Qxe1
>>  -+  (-7.13)   Depth: 2/15   00:00:00
>>1...Qxd4+ 2.Re3 Bxg3+ 3.Kg1 Qxe3+ 4.Kh1 Nf4 5.Bf1 Bxe1 6.Qxe1
>>  -+  (-7.43)   Depth: 3/19   00:00:00
>>1...Qxd4+ 2.Re3 Bxg3+ 3.Kg1 Qxe3+ 4.Kh1 Bg2+ 5.Kxg2 Qf2+ 6.Kh1 Rf5 7.Bf1 Rh5+
>>8.Bh3 Rxh3+ 9.Nh2 Rxh2#
>>  -+  (-#9)   Depth: 4/25   00:00:00
>>1...Qxd4+ 2.Re3 Bxg3+ 3.Kg1 Qxe3+ 4.Kh1 Bg2+ 5.Kxg2 Qf2+ 6.Kh1 Rf5 7.Bf1 Rh5+
>>8.Bh3 Rxh3+ 9.Nh2 Rxh2#
>>  -+  (-#9)   Depth: 5/25   00:00:00
>>1...Qxd4+ 2.Re3 Bxg3+ 3.Kg1 Qxe3+ 4.Kh1 Bg2+ 5.Kxg2 Qf2+ 6.Kh1 Rf5 7.Bf1 Rh5+
>>8.Bh3 Rxh3+ 9.Nh2 Rxh2#
>>  -+  (-#9)   Depth: 6/25   00:00:00  925kN
>>1...Qxd4+ 2.Re3 Bxg3+ 3.Kg1 Qxe3+ 4.Kh1 Bg2+ 5.Kxg2 Qf2+ 6.Kh1 Rf5 7.Bf1 Rh5+
>>8.Bh3 Rxh3+ 9.Nh2 Rxh2#
>>  -+  (-#9)   Depth: 7/25   00:00:03  3209kN
>>
>>(, MyTown 09.01.2005)
>
>checking some more programs suggest that movei is extremely slow here and other
>programs that I tried solve it in smaller depth than depth 12.
>
>Maybe the problem is pruning because it is not interested in mate when it can
>see a big score.

Uri after I get the needed data I think you may find what I am looking at
particularly interesting or atleast I hope so.  I will make sure you are aware
when I post it.

Thanks,

Les
>
>Uri



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