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Subject: Re: Fritz 7.0.0.6 has futility pruning on as default.

Author: Ed Schröder

Date: 10:28:29 01/27/02

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On January 27, 2002 at 09:43:48, Bas Hamstra wrote:

>I saw it earlier Ed :-)

Really? It must be age related then :)


>Seems like Rebel is a different animal nowadays. The
>King used to be more tactical, Rebel better in long games. But now The King
>needs 2 minutes for this one. Fritz is close at your time, takes slightly more.
>So in this position Rebel is King :-)
>
>But eh, how do you do it? :-)

I checked Century 3 but no sign of 1.Nf6+ not even 1.g6 comes to mind at 11
plies. So I assume it must be related to the changes I made in my king safety
spaghetti code.

Read Thorsten, he wants me to climb the mountain without a rope, in other words
make Rebel a second CSTAL playing poker chess, brilliant instinct sacrifices
even those with a high error margin. I don't like the high error margin thought,
I prefer to move on carefully in this area, in other words when you sacrifice it
should be right in 9 of the 10 cases.

But I am a believer now of speculative evaluation, together with a good search
depth that filters most of the errors I want to improve Rebel's playing style
and strength.

Ask Thorsten for the new paradigm, he will tell you into detail.

Ed




>Best regards,
>Bas.
>
>
>On January 27, 2002 at 09:09:05, Ed Schröder wrote:
>
>>On January 27, 2002 at 06:20:59, Bas Hamstra wrote:
>>
>>>[D]r2r1bk1/ppqb1ppp/2p1p3/6P1/2PPN3/PB3Q2/1P3P1P/1K1RR3 w - - Nf6!!
>>>
>>>Tao solves this in a couple of minutes (I believe 4 minutes to resolve the fail
>>>high). But with futility pruning turned on it doesn't. I am curious how it
>>>affects Fritz solution time. Fritz and CM see it pretty quick, in about 2
>>>minutes.
>>
>>55 seconds for Rebel Century 4 (WB), A-1400, 60 Mb hash.
>>
>>Ed
>>
>>===========================================
>>
>>00:00:00.8	0,84	6	151310	Bc2 Be7 Qh5 g6 Qh6 a5
>>00:00:01.9	0,76	7	288905	Bc2 Be7 Qh5 g6 Qh6 b5 Nf6+ Bxf6
>>00:00:01.0	0,76	8	728845	Bc2 Be7 Qh5 g6 Qh6 b5 Nf6+ Bxf6
>>00:00:03.5	0,67	9	1881667	Bc2 Be7 Qh5 g6 Qh6 Qf4 Re3 Bf8
>>00:00:12.6	0,73	10	7730501	Bc2 Be7 Re3 b5 Qh5 g6 Qh6 Qf4
>>00:00:25.5	0,75	11	17509807	Bc2 Be7 Re3 c5
>>00:00:45.6	0,77	11	31601510	g6 hxg6 Ng5 f6
>>00:00:55.7	0,77	11	38494175	Nf6+
>>00:01:20.2	1,61	11	55729659	Nf6+ gxf6 gxf6 Bh6 Re5 Kh8 Qh3
>>
>>>Best regards,
>>>Bas.



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