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Subject: Re: Fruit plays DeepBlue´s strongest move

Author: Vasik Rajlich

Date: 09:40:03 07/04/05

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On July 04, 2005 at 06:20:31, Thomas Lagershausen wrote:

> [D]r1r1q1k1/6p1/3b1p1p/1p1PpP2/1Pp5/2P4P/R1B2QP1/R5K1 w - - 0 37
>
>Fruit 2.1:
>  1/4	00:00	           5	0	+0,39	Ta8: Ta8: Ta8: Da8:
>  1/4	00:00	          21	0	+0,49	Kh1
>  1/5	00:00	          62	0	+0,52	Ta3
>  1/5	00:00	          70	0	+0,62	Ta5
>  1/5	00:00	          77	0	+0,97	Ta7 Ta7: Ta7:
>  2/8	00:00	         292	0	+0,97	Ta7 Ta7: Ta7:
>  3/8	00:00	         726	0	+0,59	Ta7 Ta7: Ta7: e4
>  4/10	00:00	       2.781	0	+0,52	Ta7 Ta7: Ta7: Ta8 Le4 Ta7: Da7:
>  5/11	00:00	       8.295	0	+0,59	Ta7 Ta7: Da7: Kh7 Le4 Dh5
>  5/11	00:00	      17.643	0	+0,70	Db6 Ta2: Ta2: Td8 Ta5 Lb4: cb4: Td5:
>  6/13	00:00	      30.673	0	+0,86	Db6 Ta2: Ta2: Dd7 Ta7 Tc7 Db8+ Kh7
>  7/16	00:00	      64.740	0	+0,98	Db6 Ta2: Ta2: Lc7 De6+ Kh7 Ta7 Dh5 h4
>  8/18	00:00	     123.240	0	+0,98	Db6 Ta2: Ta2: Lc7 De6+ Kh8 Ta6 Dd8 d6 Lb6+ Kh2
>  9/18	00:00	     212.591	0	+0,89	Db6 Ta2: Ta2: Lc7 De6+ Kf8 Ta6 Td8 Le4 Dh5 Ta7
>Dd1+ Kh2
> 10/21	00:00	     396.411	0	+0,89	Db6 Ta2: Ta2: Lc7 De6+ Kf8 Ta6 Td8 Le4 Dh5 Ta7
>Dd1+ Kh2
> 11/25	00:00	     800.293	0	+0,89	Db6 Ta2: Ta2: Lc7 De6+ Kf8 Kh1 Ta8 De8:+ Te8:
>Ta7 Ld6 Td7 Le7 d6
> 12/27	00:01	   1.456.127	960.000	+0,78	Db6 Ta2: Ta2: Lc7 De6+ Kf8 Kh1 Ta8 De8:+
>Te8: Ta7 Lb6 Tb7 Le3 Tb5: Ta8
> 13/30	00:02	   3.022.768	1.055.000	+0,99	Db6 Ta2: Ta2: Lc7 De6+ Kf8 Kf1 Ta8
>De8:+ Te8: Ta7 Te7 Tb7 e4 Tb5: Le5 Tc5 Lc3: Tc4:
> 14/35	00:04	   4.886.204	1.125.000	+0,99	Db6 Ta2: Ta2: Lc7 De6+ Kf8 Kf1 Ta8
>De8:+ Te8: Ta7 Te7 Tb7 e4 Tb5: Le5 Tc5 Lc3: Tc4:
> 15/36	00:07	   8.921.793	1.164.286	+0,99	Db6 Ta2: Ta2: Lc7 De6+ Kf8 Kf1 Ta8
>De8:+ Te8: Ta7 Te7 Tb7 e4 Tb5: Le5 Tc5 Lc3: Tc4:
> 16/42	00:18	  21.680.519	1.180.000	+0,61	Db6 Ta2: Ta2: Ta8 Ta8: Da8: Dd6: Da1+
>Kh2 Dc1 Db8+ Kh7 Db5: Df4+ Kg1 Dc1+ Ld1 Dd1:+ Kh2 Dd3 d6 Dc3: Db7
> 16/42	01:44	 123.904.617	1.185.865	+0,73	Le4 Tcb8 Ta6 Ta6: Ta6: Dd8 Kh2 Tb7 De3
>Kh8 g3 Kh7 Ta1 Td7 Ta5 Db8 Ta1
> 17/58	02:08	 145.428.631	1.131.395	+0,69	Le4 Tcb8 Ta6 Ta6: Ta6: Dd8 Kh2 Tb7 De3
>Kh8 g3 Kh7 Ta1 Td7 g4 Tb7 Df2 Td7
> 18/58	02:51	 190.552.266	1.110.890	+0,69	Le4 Tcb8 Ta6 Ta6: Ta6: Dd8 Kh2 Tb7 De3
>Kh7 g3 Db8 Ta1 De8 g4 Dd8 Dd2 Td7 Df2
> 19/58	04:08	 276.357.192	1.114.213	+0,69	Le4 Tcb8 Ta6 Ta6: Ta6: Dd8 Kh2 Tb7 De3
>Kh7 g3 Db8 g4 Df8 Ta2 De8 Ta1 Dd8 Df2 Td7
> 20/58	06:18	 417.340.778	1.100.875	+0,69	Le4 Tcb8 Ta6 Ta6: Ta6: Dd8 Kh2 Tb7 De3
>Kh7 g3 Db8 g4 Df8 Ta2 De8 Ta1 Dd8 Dd2 Td7 Df2
> 21/58	11:09	 732.290.049	1.094.633	+0,69	Le4 Tcb8 Ta6 Ta6: Ta6: Dd8 Kh2 Tb7 De3
>Kh7 g3 Kg8 Ta1 Td7 Df2 Kh7 Ta5 Db8 Ta6 Tb7 Ta1 De8
>
>37.Be4 !! after 1 Min 44sec on a Athlon 3800+ (512 MB Hash)
>
>This move breaks the nerves of worldchampion Kasparov. He thought only Karpov
>could tell the machine this move.
>
>Fruit 2.1 is very, very impressive. Any other programs?
>
>TL

For about the seventeenth time on this board: 37. Be4 is _not_ interesting. Many
engines will play it even at low depths, and furthermore it might not even be
good.

The interesting move is one move earlier, 36. axb5 rather than 36. Qb6. 36. Qb6
wins everything on the queenside - 3 pawns in the main line. 36. axb5 looks like
the result of some really huge (and pretty strange) king safety weights. I
promise Fruit won't come anywhere near 36. axb5, as its king safety is pretty
conservative.

Vas



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