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Subject: Re: Crafty can find Be3 against khalifman

Author: Roy Brunjes

Date: 05:10:31 07/12/00

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On July 11, 2000 at 20:50:35, Chessfun wrote:

>On July 11, 2000 at 19:16:41, Roy Brunjes wrote:
>
>>On July 11, 2000 at 08:20:36, blass uri wrote:
>>
>>>[D]2r2rk1/4ppb1/1p2n3/4P1B1/1p6/5P2/PPP1BP2/R3K2R w KQ - 0 1
>>>
>>>Crafty found 22.Be3 in 24 seconds(PIII450)
>>>How much time do other programs need to see Be3?
>>>
>>>Uri
>>
>>Curious -- Crafty 17.11 on my Athlon 700 does not ever select Be3.  I'm running
>>it under the Fritz 6a GUI.  Unusual thing about 17.11 on my box:  when I load
>>the engine, it says loading 17.11 but then initializing tablebase window shows
>>crafty 17.10 on it's titlebar.  The GUI in the Engine window (bottom right)
>>shows 17.11 and so does the engine parameter window.  Could I possibly have a
>>confused 17.11 install somehow?  I just downloaded the 17.11 zip file from the
>>ChessBase site and unzipped it into my Engines folder with all the other crafty
>>versions I have collected over the months.
>>
>>Roy
>
>Seems that you have the right engine and version.
>My Crafty 17.11 in F6 GUI does the exact same thing. I think CB forgot to
>rename the initializing file. However mine selects Be3 and stays with it
>as I had tried this earlier.
>
>Why yours will not choose Be3 I have no idea.
>Post the PV here please as yours should be much faster than my cel 433.
>
>2r2rk1/4ppb1/1p2n3/4P1B1/1p6/5P2/PPP1BP2/R3K2R w KQ - 0 1
>
>Analysis by Crafty 17.11:
>
>1.Bxe7 Rfe8 2.Bxb4 Nd4 3.Bd1 Rxe5+ 4.Kd2
>  +-  (2.55)   Depth: 6/14   00:00:00  20kN
>1.Bxe7 Rfe8 2.Bxb4 Nd4 3.Bd1 Nxc2+ 4.Bxc2
>  +-  (1.98)   Depth: 7/16   00:00:01  70kN
>1.Bxe7 Rfe8 2.Bxb4 Nd4 3.Bd1 Nxc2+ 4.Bxc2 Rxc2 5.f4 Rxb2
>  +-  (1.98)   Depth: 8/19   00:00:02  193kN
>1.Bxe7 Rfe8 2.Bxb4 Nd4 3.Bd1 Nxc2+ 4.Bxc2 Rxc2 5.f4 f6 6.Kd1 Rxb2
>  +-  (1.74)   Depth: 9/19   00:00:04  524kN
>1.Bxe7 Rfe8 2.Bxb4 Nd4 3.Bd1 Nxc2+ 4.Bxc2 Rxc2 5.f4 f6 6.Kd1 Rxb2
>  +-  (1.74)   Depth: 10/22   00:00:08  1302kN
>1.Be3 Rxc2 2.Bd3 Rxb2 3.Bh7+ Kh8 4.f4 b3 5.Bc1 Rxa2 6.Bb1+ Kg8 7.Bxa2 bxa2
>8.Rxa2
>  +-  (2.01)   Depth: 10/22   00:00:27  4339kN
>1.Be3 Rxc2 2.Bd3 Rxb2 3.Bh7+ Kh8 4.f4 b3 5.Bc1 Rxa2 6.Bb1+ Kg8 7.Bxa2 bxa2
>8.Rxa2
>  +-  (2.01)   Depth: 11/27   00:00:36  6087kN
>
>(Bird, Scarb 11.07.2000)
>
>Thanks.

Here's the PV from Crafty on my machine:

New position
2r2rk1/4ppb1/1p2n3/4P1B1/1p6/5P2/PPP1BP2/R3K2R w - - 0 1

Analysis by Crafty 17.11:

1.Bxe7
  +-  (3.88)   depth: 1/2   00:00:01
1.Bxe7 Rfe8
  +-  (3.64)   depth: 2/5   00:00:01
1.Bxe7 Rfe8 2.Bxb4 Bxe5
  +-  (2.77)   depth: 3/9   00:00:01
1.Bxe7 Rfe8 2.Bxb4 Bxe5
  +-  (2.77)   depth: 4/9   00:00:01
1.Bxe7 Rfe8 2.Bxb4 Rxc2 3.Bb5
  +-  (2.86)   depth: 5/11   00:00:01
1.Bxe7 Rfe8 2.Bxb4 Nd4 3.Kd1 Rxc2
  +-  (2.62)   depth: 6/13   00:00:01  19kN
1.Bxe7 Rfe8 2.Bxb4 Nd4 3.Bd1 Nxc2+ 4.Bxc2 Rxc2 5.Kd1 Rxb2
  +-  (2.34)   depth: 7/15   00:00:01  49kN
1.Bxe7 Rfe8 2.Bxb4 Nd4 3.Bd3 Bxe5 4.Rg1+ Bg7+ 5.Kd1 Nxf3
  +-  (2.09)   depth: 8/20   00:00:02  160kN
1.Bxe7 Rfe8 2.Bxb4 Nf4 3.Bd2 Nxe2 4.Kxe2 Rxe5+ 5.Kd1 Rb5 6.Bc3 Bxc3 7.bxc3 Rxc3
  +-  (1.99)   depth: 9/23   00:00:03  564kN
1.Bxe7 Rfe8 2.Bxb4 Nd4 3.Bd3 Nxc2+ 4.Bxc2 Rxc2 5.f4 Rxb2 6.Bd6 Rc2
  +-  (2.12)   depth: 10/25   00:00:06  1522kN
1.Bxe7 Rfe8 2.Bxb4 Nf4 3.Bd3 Nxd3+ 4.cxd3 Bxe5 5.Kd2 Bf4+ 6.Kd1 Red8 7.Ke1 Rxd3
8.Ke2
  +-  (2.09)   depth: 11/29   00:00:14  3567kN
1.Bxe7 Rfe8 2.Bxb4 Nd4 3.Bd3 Nxc2+ 4.Bxc2 Rxc2 5.Rg1 Rxb2 6.Bd6 f6 7.f4 Rc2
  +-  (1.96)   depth: 12/29   00:00:28  8070kN
1.Bxe7 Rfe8 2.Bxb4 Nd4 3.Bd3 Nxc2+ 4.Bxc2 Rxc2 5.f4 Rxb2 6.Bd6 f6 7.Rh5 Rc2
8.Rb1
  +-  (1.97)   depth: 13/33   00:01:02  19716kN
1.Bxe7 Rfe8 2.Bxb4 Nd4 3.c3 Nc2+ 4.Kd2 Nxa1 5.f4 Rcd8+ 6.Bd3 f6 7.exf6 Rxd3+
8.Kxd3 Rd8+ 9.Ke4 Re8+ 10.Kd5
  +-  (2.34)   depth: 14/34   00:03:12  63872kN

(Brunjes,  12.07.2000)

After 5 minutes of CPU time in Analysis mode, still no Be3.

Anyone have any ideas?

Roy



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