Fruit reloaded seems to benefit from stockfish null move

[Dann Corbit]

A trivial change to use Stockfish style null move pruning seems to have a positive effect on Fruit Reloaded.

It's only just started, but the result looks promising so far:

Code: Select all

   Program                          Elo    +   -   Games   Score   Av.Op.  Draws

 1 Fruit-reloaded-sf-null-pruning : 3352    0   0    98   100.0 %   2752    0.0 %
 2 Fruit-reloaded                 : 2834   74  78    98    26.5 %   3011    6.1 %
 3 Fruit-reloaded-mingw           : 2815   77  81    98    23.5 %   3020    6.1 %

[Dr.Wael Deeb]

A trivial change to use Stockfish style null move pruning seems to have a positive effect on Fruit Reloaded.

It's only just started, but the result looks promising so far:

Code: Select all

   Program                          Elo    +   -   Games   Score   Av.Op.  Draws

 1 Fruit-reloaded-sf-null-pruning : 3352    0   0    98   100.0 %   2752    0.0 %
 2 Fruit-reloaded                 : 2834   74  78    98    26.5 %   3011    6.1 %
 3 Fruit-reloaded-mingw           : 2815   77  81    98    23.5 %   3020    6.1 %

Wow,now this is huge....

Are you going to release this version of Fruit Dann or you're just experimenting
Dr.D

[jpqy]

just experimenting with 500Elo

Hmm..should i release it or not Dann thinking..

[Dann Corbit]

Of course I will release it.

It is a trivial change at that.

If Anthony Cozzie thought dropping straight into a q-search on a depth three search was a cheeky improvement, he would get a belly laugh from my one liner.

[Dann Corbit]

Dropbox is acting up so I posted it in the Rybka forum.
See:
http://rybkaforum.net/cgi-bin/rybkaforu ... pid=544735

[CositasBuenas]

Hi there,
a linux executable would be appreciated.
Michael

[BeyondCritics]

Congratulations!
This appears really to be sensational, given that fruit is regarded as already very highly developed.
Unfortunately not all of us, including me, are so versatile in null move pruning with stockfish style. Could you explain in a few words, what you have changed?
Thank you in advance!

[Joerg Oster]

Congratulations!
This appears really to be sensational, given that fruit is regarded as already very highly developed.
Unfortunately not all of us, including me, are so versatile in null move pruning with stockfish style. Could you explain in a few words, what you have changed?
Thank you in advance!

He copied Stockfish's computation of R into Fruit Reloaded.

Code: Select all

            // null-move search
#ifdef USE_OLD_METHOD
            new_depth = depth - NullReduction - HeightFull;
#else
			int nr = ((823 + 67 * depth) / 256 + std::min((tune_value - beta) / 100, 3));
			new_depth = depth - nr;
#endif

[Laskos]

Congratulations!
This appears really to be sensational, given that fruit is regarded as already very highly developed.
Unfortunately not all of us, including me, are so versatile in null move pruning with stockfish style. Could you explain in a few words, what you have changed?
Thank you in advance!

He copied Stockfish's computation of R into Fruit Reloaded.

Code: Select all

            // null-move search
#ifdef USE_OLD_METHOD
            new_depth = depth - NullReduction - HeightFull;
#else
			int nr = ((823 + 67 * depth) / 256 + std::min((tune_value - beta) / 100, 3));
			new_depth = depth - nr;
#endif

No way to give 500 ELO points.

[Marek Soszynski]

Hi there,
a linux executable would be appreciated.
Michael

+1