TalkChess.com

Posted: **Sun Jan 07, 2018 1:19 pm**

Conditions:
Dual AMD Opteron 6376, Cutechess-Cli, 100 games, fixed 60 seconds per move, opening book: Noomen_2-move_Testsuite.pgn, no adjudication rules, no tablebases

Stockfish 8, 31 threads, 16384 MB Hash
vs
Stockfish 8, 31 threads, 512 MB Hash

Code: Select all

1   Stockfish 8 T31 16384    +7  +3/=96/-1 51.00%   51.0/100
2   Stockfish 8 T31 512      -7  +1/=96/-3 49.00%   49.0/100
 
 Engine                 Depth       Time   Games     Moves  Average
--------------------------------------------------------------------
 Stockfish 8 T31 16384  42.11  114&#58;02&#58;17     100      7078    58.00
 Stockfish 8 T31 512    42.54  113&#58;58&#58;48     100      7076    57.99

    Program                  Elo    +   -   Games   Score   Av.Op.  Draws
 --------------------------------------------------------------------------
  1 Stockfish 8 T31 16384  &#58; 3003   16  12   100    51.0 %   2997   96.0 %
  2 Stockfish 8 T31 512    &#58; 2997   12  16   100    49.0 %   3003   96.0 %
 
Wins   = 3
Draws  = 96
Losses = 1
Av.Op. Elo = 3000
 
Result     &#58; 51.0/100 (+3,=96,-1&#41;
Perf.      &#58; 51.0 %
Margins    &#58;
 68 %      &#58; (+  1.1,-  0.9 %) -> &#91; 50.1, 52.1 %&#93;
 95 %      &#58; (+  2.3,-  1.7 %) -> &#91; 49.3, 53.3 %&#93;
 99.7 %    &#58; (+  3.8,-  2.4 %) -> &#91; 48.6, 54.8 %&#93;
 
Elo        &#58; 3007
Margins    &#58;
 68 %      &#58; (+  8,-  6&#41; -> &#91;3001,3015&#93;
 95 %      &#58; (+ 16,- 12&#41; -> &#91;2995,3023&#93;
 99.7 %    &#58; (+ 26,- 16&#41; -> &#91;2990,3033&#93;
 
Games        &#58;    100 &#40;finished&#41;
 
White Wins   &#58;      4 ( 4.0 %)
Black Wins   &#58;      0 ( 0.0 %)
Draws        &#58;     96 &#40;96.0 %)
 
White Perf.  &#58; 52.0 %
Black Perf.  &#58; 48.0 %
 
Individual statistics&#58;
 
1 Stockfish 8 T31 16384  &#58; 3003  100 (+  3,= 96,-  1&#41;, 51.0 %
2 Stockfish 8 T31 512    &#58; 2997  100 (+  1,= 96,-  3&#41;, 49.0 %

All games:
http://www.fastgm.de/schach/SF8-T31-163 ... ec-100.pgn
.

Posted: **Sun Jan 07, 2018 2:08 pm**

I've never been a fan of these huge hash sizes. Perhaps they make sense for infinite analysis where in conjunction with large pages they give a boost. But I think maybe it also varies depending on CPU, motherboard and RAM architecture as well.

Posted: **Sun Jan 07, 2018 2:29 pm**

Can you try to see what happens with 21 core vs 16 core?

Posted: **Sun Jan 07, 2018 2:51 pm**

So in a 100-game match played at 1 minute/move and with many cores, handicapping SF8 by giving it a small hash table does not "cripple" it.

Posted: **Mon Jan 08, 2018 7:55 am**

The only one single condition that "crippled" it, was the absence of a book.

Posted: **Mon Jan 08, 2018 2:13 pm**

Really surprising! 128 GB SF limit is definitely no problem. TCEC should go to 1 GB for optimal play?

Posted: **Mon Jan 08, 2018 4:18 pm**

Ozymandias wrote:The only one single condition that "crippled" it, was the absence of a book.

And TBs.

Posted: **Mon Jan 08, 2018 4:44 pm**

CMCanavessi wrote:
Ozymandias wrote:The only one single condition that "crippled" it, was the absence of a book.
And TBs.

TBs have a bigger impact at ultra fast TCs. IIRC, this was 1min/move on good HW, so not exactly crippling.

Posted: **Mon Jan 08, 2018 5:48 pm**

Ozymandias wrote:
CMCanavessi wrote:
Ozymandias wrote:The only one single condition that "crippled" it, was the absence of a book.
And TBs.
TBs have a bigger impact at ultra fast TCs. IIRC, this was 1min/move on good HW, so not exactly crippling.

No, it's not crippling but you don't just have 1 cause, you have to add them all up.

1GB hash + no TBs + no book + 1 year old version + weird time control = cripple.

If you separate them, the effect is not that noticeable.

Posted: **Mon Jan 08, 2018 7:49 pm**

CMCanavessi wrote:
Ozymandias wrote:
CMCanavessi wrote:
Ozymandias wrote:The only one single condition that "crippled" it, was the absence of a book.
And TBs.
TBs have a bigger impact at ultra fast TCs. IIRC, this was 1min/move on good HW, so not exactly crippling.
No, it's not crippling but you don't just have 1 cause, you have to add them all up.

1GB hash + no TBs + no book + 1 year old version + weird time control = cripple.

If you separate them, the effect is not that noticeable.

The book alone is noticeable.

TalkChess.com

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Re: AlphaZero Chess test - SF8 16 GB vs. 512 MB

Re: AlphaZero Chess test - SF8 16 GB vs. 512 MB

Re: AlphaZero Chess test - SF8 16 GB vs. 512 MB

Re: AlphaZero Chess test - SF8 16 GB vs. 512 MB

Re: AlphaZero Chess test - SF8 16 GB vs. 512 MB

Re: AlphaZero Chess test - SF8 16 GB vs. 512 MB

Re: AlphaZero Chess test - SF8 16 GB vs. 512 MB

Re: AlphaZero Chess test - SF8 16 GB vs. 512 MB