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Stockfish 1.7.1 update available
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Ingo Bauer



Joined: 09 Mar 2006
Posts: 1087
Location: Hamburg
PostPost subject: Re: Stockfish 1.7.1 update available    Posted: Sun Apr 11, 2010 4:11 pm Reply to topic Reply with quote
IWB wrote:
Hello Tord,

Tord Romstad wrote:
I would like to emphasize that although this version is supposed to be functionally equivalent to 1.7 with the default settings, there is one little issue to be aware of:

As explained above, this version reverts to the 1.6.3 code for detecting the number of CPU cores. This means that it doesn't choose the right number of threads by default on CPUs with hyperthreading, like my Core i7 iMac. If Stockfish doesn't detect the correct number of CPU cores on your machine, it is important not only to adjust the number of search threads, but also the "Minimum Split Depth" parameter. On a CPU with 4 or fewer cores, this parameter should be set to 4. On an eight-core machine, it should be set to 7.


Sorry, but now it seems there is a certain mess starting.

I played 1800 games and got a rating.
Then 1.7.1 was released with the info that with Zugzwang ON it might differ 1-2 Elo.
I played 300 games (Zugzwang on), checked the Elo, and where actually 3 elo below the 1800 set.
I decided this is noise, substituded the engine and got a new rating with 2100 games. (-1 Elo)
Right now I play 500 games with ONE thread with Stockfish 1.7.1 but of course I did not change the minimum split depth (and I havent for the 300 first test games).

Am I supposed to do it or not? Do I have to play all again ...

Thx and Bye
Ingo


OK, I think everything is right. ALL my computer have a Minimum Spilt Depth of 4 as I switch off HT by default and the Q6600 have it on 4 automaticaly of course! I assume that my testing was correct then ... right?

Bye
Ingo
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Subject Author Date/Time
Stockfish 1.7.1 update available Jim Ablett Sat Apr 10, 2010 11:21 pm
      Re: Stockfish 1.7.1 update available Paulo Soares Sun Apr 11, 2010 12:05 am
            Re: Stockfish 1.7.1 update available Marc Halstern Sun Apr 11, 2010 2:15 am
                  Re: Stockfish 1.7.1 update available Tord Romstad Sun Apr 11, 2010 8:10 am
                        Re: Stockfish 1.7.1 update available Charles Daniel Mon Apr 12, 2010 3:12 pm
            Re: Stockfish 1.7.1 update available Marco Costalba Sun Apr 11, 2010 8:13 am
                  Re: Stockfish 1.7.1 update available Paulo Soares Mon Apr 12, 2010 4:56 am
      Re: Stockfish 1.7.1 update available clare marie benedicto Sun Apr 11, 2010 2:44 am
      Re: Stockfish 1.7.1 update available Uri Blass Sun Apr 11, 2010 4:33 am
            Re: Stockfish 1.7.1 update available Marco Costalba Sun Apr 11, 2010 8:00 am
                  Re: Stockfish 1.7.1 update available Ingo Bauer Sun Apr 11, 2010 3:54 pm
      Re: Stockfish 1.7.1 update available James Constance Sun Apr 11, 2010 7:52 am
      Re: Stockfish 1.7.1 update available Tord Romstad Sun Apr 11, 2010 8:07 am
            Re: Stockfish 1.7.1 update available Ingo Bauer Sun Apr 11, 2010 3:48 pm
                  Re: Stockfish 1.7.1 update available Ingo Bauer Sun Apr 11, 2010 4:11 pm
                        Re: Stockfish 1.7.1 update available Marco Costalba Sun Apr 11, 2010 4:24 pm
                              Re: Stockfish 1.7.1 update available Uri Blass Sun Apr 11, 2010 4:42 pm
                                    Re: Stockfish 1.7.1 update available Marco Costalba Sun Apr 11, 2010 4:46 pm
                              Re: Stockfish 1.7.1 update available Ingo Bauer Sun Apr 11, 2010 5:04 pm
                                    Re: Stockfish 1.7.1 update available Marco Costalba Sun Apr 11, 2010 5:18 pm
                                          Re: Stockfish 1.7.1 update available Miguel A. Ballicora Sun Apr 11, 2010 8:45 pm
                                                Re: Stockfish 1.7.1 update available Marco Costalba Sun Apr 11, 2010 10:40 pm
                                                      Re: Stockfish 1.7.1 update available Miguel A. Ballicora Mon Apr 12, 2010 7:15 pm
                                                            Re: Stockfish 1.7.1 update available Greg Simpson Mon Apr 12, 2010 9:48 pm
                                                                  Re: Stockfish 1.7.1 update available Miguel A. Ballicora Mon Apr 12, 2010 10:08 pm
                                                                  Re: Stockfish 1.7.1 update available Swaminathan Thu Apr 15, 2010 3:23 pm
                                                Re: Stockfish 1.7.1 update available Eelco de Groot Sun Apr 11, 2010 11:23 pm
                        Re: Stockfish 1.7.1 update available Eelco de Groot Sun Apr 11, 2010 4:32 pm
                              Re: Stockfish 1.7.1 update available Ingo Bauer Sun Apr 11, 2010 5:05 pm
            Re: Stockfish 1.7.1 update available Daniel Mehrmann Mon Apr 12, 2010 3:31 pm
      Re: Stockfish 1.7.1 update available Tord Romstad Sun Apr 11, 2010 8:30 am
            Re: Stockfish 1.7.1 update available Aaron Becker Sun Apr 11, 2010 9:02 am
                  Re: Stockfish 1.7.1 update available Tord Romstad Sun Apr 11, 2010 8:31 pm
            Re: Stockfish 1.7.1 update available Holger Schluckebier Sun Apr 11, 2010 11:27 am
                  Re: Stockfish 1.7.1 update available Tord Romstad Sun Apr 11, 2010 8:36 pm
      Re: Stockfish 1.7.1 update available Frank Quisinsky Sun Apr 11, 2010 10:50 am
      Re: Stockfish 1.7.1 update available Harun Taner Sun Apr 11, 2010 8:25 pm
            Re: Stockfish 1.7.1 update available Eelco de Groot Sun Apr 11, 2010 9:51 pm
            Re: Stockfish 1.7.1 update available Jim Ablett Sun Apr 11, 2010 10:17 pm
                  Re: Stockfish 1.7.1 update available Eelco de Groot Sun Apr 11, 2010 10:44 pm
                  Re: Stockfish 1.7.1 update available Harun Taner Mon Apr 12, 2010 6:58 am
      Re: Stockfish 1.7.1 update available Dann Corbit Mon Apr 12, 2010 7:03 pm
            Re: Stockfish 1.7.1 update available Ralph Stoesser Mon Apr 12, 2010 8:31 pm
                  Re: Stockfish 1.7.1 update available Marco Costalba Tue Apr 13, 2010 7:46 pm
            Re: Stockfish 1.7.1 update available Harun Taner Tue Apr 13, 2010 4:12 am
                  Re: Stockfish 1.7.1 update available Dann Corbit Tue Apr 13, 2010 5:20 am
                        Re: Stockfish 1.7.1 update available Vael Jean-Paul Tue Apr 13, 2010 6:17 pm
                        Re: Stockfish 1.7.1 update available Joona Kiiski Tue Apr 13, 2010 6:40 pm
                              Re: Stockfish 1.7.1 update available Vael Jean-Paul Wed Apr 14, 2010 8:58 am
                        Re: Stockfish 1.7.1 update available Eelco de Groot Sat Apr 17, 2010 2:55 am
                              Re: Stockfish 1.7.1 update available Marco Costalba Sat Apr 17, 2010 9:33 am
                                    Re: Stockfish 1.7.1 update available Marco Costalba Sat Apr 17, 2010 10:10 am
                                          Re: Stockfish 1.7.1 update available Eelco de Groot Sat Apr 17, 2010 2:07 pm
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