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Subject: Re: Deep Fritz =-= The speedup

Author: Robert Hyatt

Date: 18:09:47 11/29/01

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On November 29, 2001 at 20:40:37, Slater Wold wrote:

>Bob asked for a 60 second run, using 1 CPU and then 2 CPUs.
>
>If anyone from Chessbase would like to respond, I invite you to do so now.
>
>1 CPU:
>
>Deep Fritz - W,S
>r1b3k1/p2p1nP1/2pqr1Rp/1p2p2P/2B1PnQ1/1P6/P1PP4/1K4R1 w - - 0 1
>
>Analysis by Deep Fritz:
>
>1.Bxe6!
>  -+  (-4.91)   Depth: 1/3   00:00:00
>1.Bxe6! Nxe6
>  -+  (-2.09)   Depth: 1/9   00:00:00
>1.Bxe6 Nxe6
>  -+  (-2.09)   Depth: 2/8   00:00:00
>1.Bxe6--
>  -+  (-2.47)   Depth: 3/6   00:00:00
>1.Bxe6-- dxe6 2.Rf6
>  -+  (-2.69)   Depth: 3/11   00:00:00
>1.Bxe6 dxe6 2.Rf6 Qxd2
>  -+  (-2.69)   Depth: 4/10   00:00:00  1kN
>1.Bxe6!
>  -+  (-2.37)   Depth: 5/11   00:00:00  7kN
>1.Bxe6! Nxe6 2.Rf6 Qe7 3.Qg6
>  -+  (-2.03)   Depth: 5/11   00:00:00  9kN
>1.Bxe6 Nxe6 2.Rf6 Qe7 3.Qg6 d5
>  -+  (-2.28)   Depth: 6/15   00:00:00  12kN
>1.Bxe6--
>  -+  (-2.59)   Depth: 7/17   00:00:00  37kN
>1.Bxe6-- dxe6 2.Rf6 Qe7 3.Rxf4
>  -+  (-2.78)   Depth: 7/17   00:00:00  44kN
>1.Bxe6!
>  -+  (-2.47)   Depth: 8/22   00:00:00  85kN
>1.Bxe6! Nxe6 2.Rf6 Qe7 3.Qg6 Bb7
>  -+  (-2.00)   Depth: 8/22   00:00:00  104kN
>1.Bxe6--
>  -+  (-2.31)   Depth: 9/19   00:00:00  197kN
>1.Bxe6-- dxe6 2.Rf6 Qe7 3.Qh4 Ng5 4.Rxh6 Kxg7 5.Rg6+ Nxg6
>  -+  (-2.72)   Depth: 9/22   00:00:00  251kN
>1.Bxe6 dxe6 2.Rf6 Qe7 3.Qh4 Ng5 4.Rxh6 Kxg7 5.Rg6+ Nxg6 6.Rxg5
>  -+  (-2.72)   Depth: 10/24   00:00:00  686kN
>1.Bxe6 dxe6 2.Rf6 Qe7 3.Qh4 Ng5 4.Rxh6 Kxg7 5.Rg6+ Nxg6 6.Rxg5
>  -+  (-2.72)   Depth: 11/29   00:00:01  1405kN
>1.Bxe6!
>  -+  (-2.41)   Depth: 12/31   00:00:05  5090kN
>1.Bxe6! Nxe6 2.Qh4 Qb4 3.Qf6 Bb7 4.Rxh6 Nxh6 5.Qxh6 Kf7
>  -+  (-2.19)   Depth: 12/31   00:00:06  6369kN
>1.Bxe6!
>  -+  (-1.87)   Depth: 13/30   00:00:10  10984kN
>1.Bxe6! Nxe6 2.Qh4 Qc7 3.Qf6 Qd8 4.Rxh6 Qxf6 5.Rxf6 Nfg5 6.h6 Bb7
>  µ  (-1.09)   Depth: 13/34   00:00:13  14264kN
>
>(W,  29.11.2001)
>
>
>2 CPUs:
>
>Deep Fritz - W,S
>r1b3k1/p2p1nP1/2pqr1Rp/1p2p2P/2B1PnQ1/1P6/P1PP4/1K4R1 w - - 0 1
>
>Analysis by Deep Fritz:
>
>1.Bxe6!
>  -+  (-4.91)   Depth: 1/3   00:00:00
>1.Bxe6! Nxe6
>  -+  (-2.09)   Depth: 1/9   00:00:00
>1.Bxe6 Nxe6
>  -+  (-2.09)   Depth: 2/8   00:00:00
>1.Bxe6--
>  -+  (-2.47)   Depth: 3/6   00:00:00
>1.Bxe6-- dxe6 2.Rf6
>  -+  (-2.69)   Depth: 3/11   00:00:00
>1.Bxe6 dxe6 2.Rf6 Qxd2
>  -+  (-2.69)   Depth: 4/10   00:00:00  1kN
>1.Bxe6!
>  -+  (-2.37)   Depth: 5/11   00:00:00  7kN
>1.Bxe6! Nxe6 2.Rf6 Qe7 3.Qg6
>  -+  (-2.03)   Depth: 5/11   00:00:00  9kN
>1.Bxe6 Nxe6 2.Rf6 Qe7 3.Qg6 d5
>  -+  (-2.28)   Depth: 6/12   00:00:00  13kN
>1.Bxe6--
>  -+  (-2.59)   Depth: 7/15   00:00:00  42kN
>1.Bxe6-- dxe6 2.Rf6 Qe7 3.Rxf4
>  -+  (-2.78)   Depth: 7/17   00:00:00  46kN
>1.Bxe6!
>  -+  (-2.47)   Depth: 8/17   00:00:00  87kN
>1.Bxe6! Nxe6 2.Rf6 Qe7 3.Qg6 Bb7
>  -+  (-2.00)   Depth: 8/19   00:00:00  105kN
>1.Bxe6--
>  -+  (-2.31)   Depth: 9/19   00:00:00  211kN
>1.Bxe6-- dxe6 2.Rf6 Qe7 3.Qh4 Ng5 4.Rxh6 Kxg7 5.Rg6+ Nxg6
>  -+  (-2.72)   Depth: 9/19   00:00:00  298kN
>1.Bxe6 dxe6 2.Rf6 Qe7 3.Qh4 Ng5 4.Rxh6 Kxg7 5.Rg6+ Nxg6 6.Rxg5
>  -+  (-2.72)   Depth: 10/22   00:00:00  744kN
>1.Bxe6 dxe6 2.Rf6 Qe7 3.Qh4 Ng5 4.Rxh6 Kxg7 5.Rg6+ Nxg6 6.Rxg5
>  -+  (-2.72)   Depth: 11/21   00:00:01  1456kN
>1.Bxe6!
>  -+  (-2.41)   Depth: 12/32   00:00:06  6341kN
>1.Bxe6! Nxe6 2.Qh4 Qb4 3.Qf6 Bb7 4.Rxh6 Nxh6 5.Qxh6 Kf7
>  -+  (-2.19)   Depth: 12/32   00:00:07  7740kN
>1.Bxe6!
>  -+  (-1.87)   Depth: 13/31   00:00:11  12604kN
>1.Bxe6! Nxe6 2.Qh4 Qc7 3.Qf6 Qd8 4.Rxh6 Qxf6 5.Rxf6 Nfg5 6.h6 Bb7
>  µ  (-1.09)   Depth: 13/33   00:00:14  16144kN
>
>(W,  29.11.2001)
>
>
>I set the Fritz GUI to move in 60 seconds.  It decided it didn't need that long.
>
>I don't even think there is a speedup here, at all.

OK... that is horrible, and it does show that there is little speedup,
rather than a KNPS computation problem.

No explanation on why this is so of course.  But for this position, you
are certainly correct.  It is ugly.




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