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Subject: Re: Deep Fritz Speedup

Author: Uri Blass

Date: 23:44:24 11/20/01

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On November 21, 2001 at 01:46:28, Slater Wold wrote:

>On November 20, 2001 at 23:13:02, Uri Blass wrote:
>
>>On November 20, 2001 at 22:10:09, Slater Wold wrote:
>>
>>>1 CPU:
>>>
>>>Deep Fritz - W,S
>>>r2qrb1k/1p1b2p1/p2ppn1p/8/3NP3/1BN5/PPP3QP/1K3RR1 w - - 0 1
>>>
>>>Analysis by Deep Fritz:
>>>
>>>1.Qg6 Rc8 2.h4
>>>  =  (0.06)   Depth: 3/11   00:00:00
>>>1.Qg6 Rc8 2.h4
>>>  =  (0.06)   Depth: 3/11   00:00:00
>>>1.Qg6 Rc8 2.h4
>>>  =  (0.06)   Depth: 3/11   00:00:00
>>>1.Qg6 Rc8 2.h4
>>>  =  (0.06)   Depth: 3/11   00:00:00
>>>1.Qg6 Rc8 2.h4 Qc7
>>>  =  (-0.06)   Depth: 4/15   00:00:00  1kN
>>>1.Qg6 Rc8 2.h4 Qc7
>>>  =  (-0.06)   Depth: 4/15   00:00:00  1kN
>>>1.Qg6 Rc8 2.h4 Qc7
>>>  =  (-0.06)   Depth: 4/15   00:00:00  1kN
>>>1.Nde2!
>>>  =  (-0.03)   Depth: 4/15   00:00:00  4kN
>>>1.Nde2 Rc8 2.Nf4 g5 3.Ng6+ Kh7
>>>  =  (0.03)   Depth: 5/17   00:00:00  8kN
>>>1.Nce2!
>>>  =  (0.06)   Depth: 5/18   00:00:00  16kN
>>>1.Nce2 g5 2.h4 g4 3.Nf4 Qc8
>>>  =  (0.16)   Depth: 6/20   00:00:00  34kN
>>>1.Nce2 e5 2.Nf5 Bxf5 3.Rxf5 Rc8 4.Nc3 Qc7
>>>  =  (0.09)   Depth: 7/25   00:00:00  102kN
>>>1.Nce2 e5 2.Nf5 Bxf5 3.Rxf5 Rc8 4.Nc3 Qc7 5.Bd5
>>>  ²  (0.38)   Depth: 8/26   00:00:00  314kN
>>>1.Nce2 e5 2.Nf5 Bxf5 3.Rxf5 Rc8 4.Bd5 Qc7 5.Nc3 b5
>>>  ²  (0.38)   Depth: 9/24   00:00:00  668kN
>>>1.Nf3!
>>>  ²  (0.41)   Depth: 9/29   00:00:01  1487kN
>>>1.Nf3! Qa5 2.Nh4 Qg5 3.Qxg5 hxg5 4.Ng6+ Kh7 5.Rxg5 Be7
>>>  ²  (0.44)   Depth: 9/29   00:00:02  2617kN
>>>1.Nf3 Qa5 2.Nh4 Qg5 3.Qxg5 hxg5 4.Ng6+ Kh7 5.Rxg5 Kh6 6.h4 Be7
>>>  ²  (0.38)   Depth: 10/28   00:00:04  4195kN
>>>1.Nce2!
>>>  ²  (0.41)   Depth: 10/28   00:00:04  4662kN
>>>1.Nce2!
>>>  ±  (0.72)   Depth: 11/30   00:00:08  8592kN
>>>1.Nce2 e5 2.Nf5 Bxf5 3.Rxf5 Qe7 4.Rgf1 d5 5.Bxd5 Nxd5 6.exd5 Qd6
>>>  ²  (0.66)   Depth: 12/35   00:00:16  17113kN
>>>1.Nf3!
>>>  ²  (0.69)   Depth: 12/35   00:00:25  27163kN
>>>1.Nf3! Bc6 2.Nh4 g5 3.Ng6+ Kg7 4.Nxf8 Rxf8 5.h4 Kf7 6.hxg5 hxg5
>>>  ±  (0.97)   Depth: 12/35   00:00:43  45849kN
>>>1.Nf3 Qa5 2.Nh4 Qg5 3.Ng6+ Kh7 4.Qf3 Qa5 5.Nxf8+ Rxf8 6.Qg3 Nh5
>>>  ±  (0.97)   Depth: 13/35   00:01:18  83931kN
>>>
>>>(W,  20.11.2001)
>>>
>>>2 CPU's:
>>>
>>>Deep Fritz - W,S
>>>r2qrb1k/1p1b2p1/p2ppn1p/8/3NP3/1BN5/PPP3QP/1K3RR1 w - - 0 1
>>>
>>>Analysis by Deep Fritz:
>>>
>>>1.Qg6 Rc8
>>>  =  (0.06)   Depth: 2/8   00:00:00
>>>1.Qg6 Rc8 2.h4
>>>  =  (0.06)   Depth: 3/11   00:00:00
>>>1.Qg6 Rc8 2.h4
>>>  =  (0.06)   Depth: 3/11   00:00:00
>>>1.Qg6 Rc8 2.h4
>>>  =  (0.06)   Depth: 3/11   00:00:00
>>>1.Qg6 Rc8 2.h4
>>>  =  (0.06)   Depth: 3/11   00:00:00
>>>1.Qg6 Rc8 2.h4 Qc7
>>>  =  (-0.06)   Depth: 4/15   00:00:00  1kN
>>>1.Qg6 Rc8 2.h4 Qc7
>>>  =  (-0.06)   Depth: 4/15   00:00:00  1kN
>>>1.Nde2!
>>>  =  (-0.03)   Depth: 4/15   00:00:00  4kN
>>>1.Nde2 Rc8 2.Nf4 g5 3.Ng6+ Kh7
>>>  =  (0.03)   Depth: 5/14   00:00:00  8kN
>>>1.Nce2!
>>>  =  (0.06)   Depth: 5/18   00:00:00  17kN
>>>1.Nce2 g5 2.h4 g4 3.Nf4 Qc8
>>>  =  (0.16)   Depth: 6/20   00:00:00  34kN
>>>1.Nce2 e5 2.Nf5 Bxf5 3.Rxf5 Rc8 4.Nc3 Qc7
>>>  =  (0.09)   Depth: 7/25   00:00:00  103kN
>>>1.Nce2 e5 2.Nf5 Bxf5 3.Rxf5 Rc8 4.Nc3 Qc7 5.Bd5
>>>  ²  (0.38)   Depth: 8/25   00:00:00  317kN
>>>1.Nce2 e5 2.Nf5 Bxf5 3.Rxf5 Rc8 4.Bd5 Qc7 5.Nc3 b5
>>>  ²  (0.38)   Depth: 9/24   00:00:00  661kN
>>>1.Nf3!
>>>  ²  (0.41)   Depth: 9/27   00:00:01  1599kN
>>>1.Nf3! Qa5 2.Nh4 Qg5 3.Qxg5 hxg5 4.Ng6+ Kh7
>>>  ²  (0.44)   Depth: 9/27   00:00:02  3413kN
>>>1.Nf3 Qa5 2.Nh4 Qg5 3.Qxg5 hxg5 4.Ng6+ Kh7 5.Nxf8+ Rxf8 6.Rd1 Ne8
>>>  ²  (0.38)   Depth: 10/30   00:00:03  4601kN
>>>1.Nce2!
>>>  ²  (0.41)   Depth: 10/30   00:00:04  5076kN
>>>1.Nce2!
>>>  ±  (0.72)   Depth: 11/29   00:00:06  8587kN
>>>1.Nce2 e5 2.Nf5 Bxf5 3.Rxf5 Qe7 4.Rgf1 d5 5.Bxd5 Nxd5 6.exd5 Qd6
>>>  ²  (0.66)   Depth: 12/31   00:00:12  16798kN
>>>1.Nf3!
>>>  ²  (0.69)   Depth: 12/32   00:00:20  26626kN
>>>1.Nf3! Bc6 2.Nh4 g5 3.Ng6+ Kg7 4.Nxf8 Rxf8 5.h4 Kf7 6.hxg5 hxg5
>>>  ±  (0.97)   Depth: 12/33   00:00:33  45510kN
>>>1.Nf3 Qa5 2.Nh4 Qg5 3.Ng6+ Kh7 4.Qf3 Qa5 5.Nxf8+ Rxf8 6.Qg3 Nh5
>>>  ±  (1.00)   Depth: 13/35   00:00:59  81622kN
>>>
>>>(W,  20.11.2001)
>>>
>>>
>>>What's the speedup on that?
>>
>>25/20=1.25
>>
>>Deep Fritz one processor needed 25 seconds to find Nf3 when Deep Fritz one
>>processor needed 20 seconds to find Nf3.
>>
>>The speed up seems to be slightly better at longer time control(Deep Fritz
>>needed 59 seconds to get a score at depth 13 with 2 proccesors against 78
>>seconds with one processor and almost the same pv
>>
>>78/59>1.25
>>
>>Uri
>
>So to answer some people's questions out there, yes, Chessbase lied.
>
>I have had 3 SMP systems, and all have run DF.  None of them have _EVER_ gotten
>an 80% speedup.
>
>The 2xP31.0Ghz got the best speedup; 1.4 on most positions.
>
>The 2xXP1.53Ghz gets the worst speedup; 1.25 (1.3 in my longer tests) on most
>positions.
>
>I don't know many people who use DF, but the ones I have talked to, get lousy
>results too.

You may be right but one position is not enough.

I use Deep Fritz but I do not use more than one processor and the reason for me
to buy Deep Fritz was simply the fact that it is better on one processor.

Uri



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