Ask about similar eval function

Discussion about development of draughts in the time of computer and Internet.
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Catherine
Posts: 129
Joined: Tue Aug 14, 2012 22:24
Real name: Catherine Bourneuf

Ask about similar eval function

Post by Catherine » Sun May 14, 2017 07:53

Hi all,

I thought since a week about a theory:

If an engine B use the same eval function than an other A.
If the win margin of A against engine C is almost 15%
and win margin of B against C is almost 40%

Please, Is it possible to have the same eval function and don't have the same strenght? Thank

Catherine.

Rein Halbersma
Posts: 1635
Joined: Wed Apr 14, 2004 16:04
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Re: Ask about similar eval function

Post by Rein Halbersma » Sun May 14, 2017 12:15

Catherine wrote:Hi all,

I thought since a week about a theory:

If an engine B use the same eval function than an other A.
If the win margin of A against engine C is almost 15%
and win margin of B against C is almost 40%

Please, Is it possible to have the same eval function and don't have the same strenght? Thank

Catherine.
Of course, because strength = search + eval. If search of A is worse than B, then B would be stronger.

Catherine
Posts: 129
Joined: Tue Aug 14, 2012 22:24
Real name: Catherine Bourneuf

Re: Ask about similar eval function

Post by Catherine » Mon May 15, 2017 04:41

Rein Halbersma wrote:
Catherine wrote:Hi all,

I thought since a week about a theory:

If an engine B use the same eval function than an other A.
If the win margin of A against engine C is almost 15%
and win margin of B against C is almost 40%

Please, Is it possible to have the same eval function and don't have the same strenght? Thank

Catherine.
Of course, because strength = search + eval. If search of A is worse than B, then B would be stronger.
Hi,

Thank, this is clear now.
So the search speed it's an important factor in the strenght of an engine.
I asked this because if i take into account the BMI2 of Joost that apparently increase search speech, Argus 1.0A6x64 is very fast some tests are been done on core i5 with 8Go of Ram Windows 8.1

PS: this it's just to have answer to my question about the relationship between search speed and stregnht.

Blitz game beetween Scan 2.0 , Kingsrow 1.58, Argus 1.0A6 and Argus 10A7
1min/90 moves
hash size 512
no endgame database
no pondering
no opening book

1rst 20 test games: Kingsrow 1.58 versus Argus 1.0A7 that seem have same strenght than Scan 2.0
KVA7_1-3_nobookegdb_1min[1].pdn
(21.77 KiB) Downloaded 138 times
2nd 20 test games: Kingsrow 1.58 versus Argus 1.0A6 that seem to be very fast
KVA6_0-15_nobookegdb_1min[1].pdn
(22.08 KiB) Downloaded 136 times
3rd 20 test games: Kingsrow 1.58 versus Scan 2.0
KVS_1-3_nobookegdb_1min[1].pdn
(21.77 KiB) Downloaded 142 times
4th 20 test games: Scan 2.0 versus Argus 1.0A6
SVA6_0-9_nobookegdb_1min[1].pdn
(21.48 KiB) Downloaded 141 times


158 dxpgames 2 ballots game beetween Scan 2.0 , Kingsrow 1.58, Argus 1.0A6
10min/90 moves
hash size 512
no endgame database
no pondering
no opening book

1rst 158 dxpgame: Kingsrow 1.58 versus Argus 1.0A6
KVA_5-24_nobookegdb_10min[1].pdn
(183.83 KiB) Downloaded 135 times

Catherine
Posts: 129
Joined: Tue Aug 14, 2012 22:24
Real name: Catherine Bourneuf

Re: Ask about similar eval function

Post by Catherine » Mon May 15, 2017 04:51

2nd 158 dxpgame: Kingsrow 1.58 versus Scan 2.0
KVS_3-9_nobookegdb_10min[1].pdn
(175.81 KiB) Downloaded 165 times
--Catherine

Krzysztof Grzelak
Posts: 782
Joined: Thu Jun 20, 2013 17:16
Real name: Krzysztof Grzelak

Re: Ask about similar eval function

Post by Krzysztof Grzelak » Tue May 16, 2017 08:16

Specify what are the results of matches between programs and improve the configuration of some programs.

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