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Subject: Re: Crafty 17.11 goes undefeated to win in home brew tournament. <huge post>

Author: Ralf Elvsén

Date: 00:41:08 08/04/00

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On August 04, 2000 at 01:17:28, Chessfun wrote:

>On August 04, 2000 at 01:10:13, blass uri wrote:
>
>>On August 04, 2000 at 00:59:42, Chessfun wrote:
>>
>>>On August 04, 2000 at 00:22:21, Mark Young wrote:
>>>
>>>>Fritz 6a will play the correct move but needed more time, but if you set the
>>>>tablebase depth to 0 in Fritz 6a it will correct this problem, but at the cost
>>>>of search speed because of the amount of tablebase hits to the harddrive. All
>>>>examples below.
>>>
>>>>1.Nc4 Nxc4 2.c7 Ne3 3.a7 Ra3 4.Kb5 Nf5 5.Kb4 Nd6
>>>>  -+  (-2.28)   depth: 14/34   00:00:36  29396kN, tb=444
>>>>1.Kxb6
>>>>  -+  (-2.25)   depth: 14/34   00:00:40  32722kN, tb=562
>>>
>>>Analysis by Fritz 6:
>>>1.Nc4 Nxc4 2.c7 Ne3 3.a7 Ra3 4.Kb5 Nf5 5.Kb4 Nd6
>>>  -+  (-2.44)   Depth: 14/32   00:01:42  26500kN, tb=302
>>>1.Nc4 Nxc4 2.c7 Ne3 3.a7 Ra3 4.Kb5 Nf5 5.Kb4 Nd6
>>>  -+  (-2.44)   Depth: 15/35   00:03:47  58562kN, tb=791
>>>1.Kxb6
>>>  -+  (-2.41)   Depth: 15/35   00:05:25  80105kN, tb=1148
>>>
>>>Are your tablebases on your hardrive?.
>>>This 40 secs is FAST. On my cel 433 takes 5:25 to see it.
>>>But why is yours at depth 14/34 mine at 15/35?
>>
>>A possible reason may be if he has more tablebases.
>>The chessbase CD does not include all the 5 piece tablebases.
>>
>>Uri
>
>You are probably right, I think it is also likely Mark has them
>installed on his hardrive.
>Odd, now I change Tablebases to 0 and it sees it at 14/30.
>Tablebases at 0 clearly are faster also for me.
>Why is default set at 3?.
>
>8/8/PnP3k1/2K5/7p/3rN3/8/8 w - - 0 1
>
>Analysis by Fritz 6:
>1.Nc4 Nxc4 2.c7 Ne3 3.a7 Ra3 4.Kb5 Nf5 5.Kb4 Nd6
>  -+  (-2.31)   Depth: 13/28   00:01:15  5802kN, tb=1309
>1.Nc4 Nxc4 2.c7 Ne3 3.a7 Ra3 4.Kb5 Nf5 5.Kb4 Nd6
>  -+  (-2.06)   Depth: 14/30   00:03:13  13234kN, tb=2917
>1.Kxb6
>  -+  (-2.03)   Depth: 14/30   00:03:35  13811kN, tb=3302
>
>(Bird, Scarb 04.08.2000)
>
>Thanks.

Could someone please explain the definition of the "Table base depth"-
parameter for Fritz 6 (Light) ?

Btw, my Fritz 6 Light with 4-men EGTB sees a score 0.0 for Kxb6
within 5 secs at depth 12.

Ralf



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