Stockfish Tuning

Not sure if I should ask this question in this thread, but I'm wondering if anyone has answer to the following questions:

1. Do changes of the Stockfish settings have any effect? I assume they do (why else would they be there), but am not sure.
2. If the answer to question 1 is "Yes": does anyone have an idea what settings would make Stockfish perfom good (or even excellent)?
3. Who is you guys is experimenting (in a systematic way, not just playing around) with Stockfish settings? I would like to get in contact with you. Maybe we can collaborate and find good optimized settings.

Thanks to all for taking the time to read and anwers my questions.

Pilgrim

@Pilgrim74 wrote:

Not sure if I should ask this question in this thread, but I'm wondering if anyone has answer to the following questions:

1. Do changes of the Stockfish settings have any effect? I assume they do (why else would they be there), but am not sure.
2. If the answer to question 1 is "Yes": does anyone have an idea what settings would make Stockfish perfom good (or even excellent)?
3. Who is you guys is experimenting (in a systematic way, not just playing around) with Stockfish settings? I would like to get in contact with you. Maybe we can collaborate and find good optimized settings.

Thanks to all for taking the time to read and anwers my questions.

Pilgrim

Try these settings:
Mobility (Middle Game) = 90
Passed Pawns (Middle Game) = 90
Or
Stockfish PHQ by Frank Quisinsky
Mobility (Middle Game)=125
Aggressiveness=150
Cowardice=75

The settings are one OR the other or u can combine the 2 of them???

@Ahmed Kamal wrote:

@Pilgrim74 wrote:

Not sure if I should ask this question in this thread, but I'm wondering if anyone has answer to the following questions:

1. Do changes of the Stockfish settings have any effect? I assume they do (why else would they be there), but am not sure.
2. If the answer to question 1 is "Yes": does anyone have an idea what settings would make Stockfish perfom good (or even excellent)?
3. Who is you guys is experimenting (in a systematic way, not just playing around) with Stockfish settings? I would like to get in contact with you. Maybe we can collaborate and find good optimized settings.

Thanks to all for taking the time to read and anwers my questions.

Pilgrim

Try these settings:
Mobility (Middle Game) = 90
Passed Pawns (Middle Game) = 90
Or
Stockfish PHQ by Frank Quisinsky
Mobility (Middle Game)=125
Aggressiveness=150
Cowardice=75

@Ahmed Kamal wrote:

@Pilgrim74 wrote:

Not sure if I should ask this question in this thread, but I'm wondering if anyone has answer to the following questions:

1. Do changes of the Stockfish settings have any effect? I assume they do (why else would they be there), but am not sure.
2. If the answer to question 1 is "Yes": does anyone have an idea what settings would make Stockfish perfom good (or even excellent)?
3. Who is you guys is experimenting (in a systematic way, not just playing around) with Stockfish settings? I would like to get in contact with you. Maybe we can collaborate and find good optimized settings.

Thanks to all for taking the time to read and anwers my questions.

Pilgrim

Try these settings:
Mobility (Middle Game) = 90
Passed Pawns (Middle Game) = 90
Or
Stockfish PHQ by Frank Quisinsky
Mobility (Middle Game)=125
Aggressiveness=150
Cowardice=75

Thanks Ahmed!   I will try those settings with the latest version of Stockfish.  

-Pilgrim

for which stockfish are the first suggested settings? and what is Stockfish PHQ by Frank Quisinsky???
Thx in adavnce to everybody helping here.

@Pilgrim74 wrote:

@Ahmed Kamal wrote:

@Pilgrim74 wrote:

Not sure if I should ask this question in this thread, but I'm wondering if anyone has answer to the following questions:

1. Do changes of the Stockfish settings have any effect? I assume they do (why else would they be there), but am not sure.
2. If the answer to question 1 is "Yes": does anyone have an idea what settings would make Stockfish perfom good (or even excellent)?
3. Who is you guys is experimenting (in a systematic way, not just playing around) with Stockfish settings? I would like to get in contact with you. Maybe we can collaborate and find good optimized settings.

Thanks to all for taking the time to read and anwers my questions.

Pilgrim

Try these settings:
Mobility (Middle Game) = 90
Passed Pawns (Middle Game) = 90
Or
Stockfish PHQ by Frank Quisinsky
Mobility (Middle Game)=125
Aggressiveness=150
Cowardice=75

Thanks Ahmed!   I will try those settings with the latest version of Stockfish.  

-Pilgrim

Stockfish RAu4

right side of image?

Aggressiveness=105
Cowardice=105

13-11-13 gl master diff

ELO: 1.17 +-1.9 (95%) LOS: 88.4%
Total: 38841 W: 6088 L: 5957 D: 26796

http://tests.stockfishchess.org/tests

Good settings!

These are the settings i am testing; i guess that many improvements can be made "playing" with different parameters....
Welcome them!!! Lets share them....!!!!
Thx

contempt factor=0
mobility midgame=122
mobility endgame=136
pawn structure midgame=95
idem endgame=95
passed pawns midgame=123
idem endgame=137
space=98
agressiveness=142
cowardice=121
min split depth =1
max threads per split point=5
threads= 8 (logical, not cores or should we use 2 or 4 cores or the max phisycal cores we have???)
idle threads sleep=true
the other settings as default.....

@MALIBU wrote:

threads= 8 (logical, not cores or should we use 2 or 4 cores or the max phisycal cores we have???)

Use the same number of physical cores as your hardware indicates and not the number of virtual threads. I think that hyperthreading is only good for running multiple operating systems; otherwise for computer chess it would only disintegrate performance of the Stockfish engine just as it would the Houdini engine.

ok, u are right, but in such case we should change the max threads per split point to which number????

VocalTechnique wrote:

@MALIBU wrote:

threads= 8 (logical, not cores or should we use 2 or 4 cores or the max phisycal cores we have???)

Use the same number of physical cores as your hardware indicates and not the number of virtual threads. I think that hyperthreading is only good for running multiple operating systems; otherwise for computer chess it would only disintegrate performance of the Stockfish engine just as it would the Houdini engine.

@MALIBU wrote:

ok, u are right, but in such case we should change the max threads per split point to which number????

VocalTechnique wrote:

@MALIBU wrote:

threads= 8 (logical, not cores or should we use 2 or 4 cores or the max phisycal cores we have???)

Use the same number of physical cores as your hardware indicates and not the number of virtual threads. I think that hyperthreading is only good for running multiple operating systems; otherwise for computer chess it would only disintegrate performance of the Stockfish engine just as it would the Houdini engine.

By default

Minimum Split Depth is 0
Maximum Threads per Split Point is 5

I think Minimum Split Depth is 0, because it allows Stockfish to "Split" the Depth without any limitation so I would not recommend changing that.

As for Maximum Threads per Split Point, if 5 is chosen for 4 cores by default, then I would incrementally increase to 5 by 1 for each core of hardware.

5 = 4
6 = 6
7 = 8
etc.

This above suggestion is for experimentation only ^

But if you do not feel comfortable with manipulating the maximum threads per split point,

Marco Costalba says this:

"Stockfish automatically adjusts the value of
max-threads-per-split-point according to the available number of
threads (cores), so I just suggest to leaving the defaults."

Some food for Thought - Optimal-number-of-threads-per-core

Optimal Number of Threads per Core

Aggressiveness=105
Best Book Move=False
Book Fale=C:\Engines.UCI\Stockfish\book.bin
Contempt Factor=20
Cowardice=80
Emergency Base Time=200
Emergency Move Horizon=40
Emergency Move Time=70
Idle Threads Sleep=True
Max Threads per Split Point=5
Min Split Depth=2
Minimum Thinking Time=20
Mobility(Endgame)=120
Mobility(Midgame)=100
MultiPV=1
OwnBook=True
Passed Pawns (Endgame)=130
Passed Pawns (Midgame)=100
Pawn Structure (Endgame)=120
Pawn Structure (Midgame)=100
Ponder=True
Use Search Log=True
Search Log Filename=C:\Users\Admin\Documents\Search Log 21.txt
Skill Level=20
Slow Mover=55
Space=110
Threads=2
TryLargePages=False
UCI_AnalyseMode=False
Write Debug Log=False
Write Search Log=False

Testing...

Bob wrote:

Testing...

Thanks Bob

Thanks Bob.

Stockfish plays a little stronger with "Aggressiveness=90" !

@Ahmed Kamal wrote:

Stockfish plays a little stronger with "Aggressiveness=90" !

Thanks Ahmed  

Stockfish 091213 64 (A90); Aggressiveness = 90 (Ahmed's suggestion).

Great!!!

To complement Ahmed's suggestion , which value do u setup cowardice?
Thx    

Bob wrote:

Code:

Games Completed = 500 of 500 (Avg game length = 31.066 sec)
Settings = RR/32MB/4000ms+200ms/M 700000cp for 7 moves, D 150 moves/EPD:D:\LittleBlitzer\openings.epd(4000)
Time = 4020 sec elapsed, 0 sec remaining

 1.  Stockfish 091213 64 (A90)       265.5/500 127-96-277   (L: m=96 t=0 i=0 a=0) (D: r=220 i=37 f=10 s=0 a=10) (tpm=244.0 d=18.91 nps=1190073)
 2.  Stockfish 091213 64             234.5/500 96-127-277   (L: m=127 t=0 i=0 a=0) (D: r=220 i=37 f=10 s=0 a=10) (tpm=244.7 d=18.84 nps=1190348)

Stockfish 091213 64 (A90); Aggressiveness = 90 (Ahmed's suggestion).

Great!!!

@MALIBU wrote:

To complement Ahmed's suggestion , which value do u setup cowardice?
Thx    

Bob wrote:

Code:

Games Completed = 500 of 500 (Avg game length = 31.066 sec)
Settings = RR/32MB/4000ms+200ms/M 700000cp for 7 moves, D 150 moves/EPD:D:\LittleBlitzer\openings.epd(4000)
Time = 4020 sec elapsed, 0 sec remaining

 1.  Stockfish 091213 64 (A90)       265.5/500 127-96-277   (L: m=96 t=0 i=0 a=0) (D: r=220 i=37 f=10 s=0 a=10) (tpm=244.0 d=18.91 nps=1190073)
 2.  Stockfish 091213 64             234.5/500 96-127-277   (L: m=127 t=0 i=0 a=0) (D: r=220 i=37 f=10 s=0 a=10) (tpm=244.7 d=18.84 nps=1190348)

Stockfish 091213 64 (A90); Aggressiveness = 90 (Ahmed's suggestion).

Great!!!

as Ahmed said, just Aggressiveness = 90.

COWARDICE value.

Bob wrote:

@MALIBU wrote:

To complement Ahmed's suggestion , which value do u setup cowardice?
Thx    

Bob wrote:

Code:

Games Completed = 500 of 500 (Avg game length = 31.066 sec)
Settings = RR/32MB/4000ms+200ms/M 700000cp for 7 moves, D 150 moves/EPD:D:\LittleBlitzer\openings.epd(4000)
Time = 4020 sec elapsed, 0 sec remaining

 1.  Stockfish 091213 64 (A90)       265.5/500 127-96-277   (L: m=96 t=0 i=0 a=0) (D: r=220 i=37 f=10 s=0 a=10) (tpm=244.0 d=18.91 nps=1190073)
 2.  Stockfish 091213 64             234.5/500 96-127-277   (L: m=127 t=0 i=0 a=0) (D: r=220 i=37 f=10 s=0 a=10) (tpm=244.7 d=18.84 nps=1190348)

Stockfish 091213 64 (A90); Aggressiveness = 90 (Ahmed's suggestion).

Great!!!

as Ahmed said, just Aggressiveness = 90.