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Toga II 4.0 release
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J Donald



Joined: 24 Oct 2012
Posts: 247

PostPost subject: Toga II 4.0 release    Posted: Fri Dec 29, 2017 5:37 am Reply to topic Reply with quote

Dear all,

Happy New Year! It is my pleasure, after a break of several years from computer chess, to release Toga II 4.0.

Strength

Self-play results:
+80 elo at 4' + 0.04' on 1 thread after 4000 games
+85 elo at 10' + 0.1' on 4 threads after 2000 games

So while I doubt the rating lists will show +80 elo it should be significantly stronger than Toga II 3.0 or any other Fruit derivative and also one of the strongest array-based engines in the world. Needless to say, Stockfish and the other top engines still smash it though ...

Compiles

- The IntelPGO compiles should be the fastest. However, if there are any problems, GCC and Intel non-PGO compiles are also provided.
- The x64 compile runs about 10% faster than the w32 compile on my machines.
- At this stage I do not have Linux, Mac or Android compiles. Hopefully someone will provide these at some stage.

Major changes

For a full list of changes since Toga II 3.0, see readme.txt in the package. The major changes are:
- code tidy-up, removed a lot of unused / defunct code and fixed a few bugs.
- Toga II can now use up to 16 GB hash and up to 64 threads, and the lazy SMP design has been tweaked.
- fixed aspiration windows, and skip fail-high research for single-thread competitive games (same patch as SF tested a day ago).
- removed egbb support. Instead I plan to add support for Ronald De Man's excellent syzygy bases for future releases.
- added eval pruning (also called static null move pruning), and move count based pruning;
- improved null move: reduction (3 + depth/4) from Stockfish used, and double null move avoided;
- better usage of hash in quiescent search;
- bad captures reduced less;
- history aging.

Have fun!

Jerry
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Subject Author Date/Time
Toga II 4.0 release J Donald Fri Dec 29, 2017 5:37 am
      Re: Toga II 4.0 release Graham Banks Fri Dec 29, 2017 5:44 am
            Re: Toga II 4.0 release Damir Desevac Fri Dec 29, 2017 8:07 am
      Re: Toga II 4.0 release Ulysses P. Fri Dec 29, 2017 8:27 am
            Re: Toga II 4.0 release Brendan J. Norman Fri Dec 29, 2017 8:37 am
                  Re: Toga II 4.0 release Ulysses P. Fri Dec 29, 2017 9:47 am
                        Re: Toga II 4.0 release J Donald Fri Dec 29, 2017 10:50 am
                              Re: Toga II 4.0 release Ulysses P. Fri Dec 29, 2017 12:06 pm
            Re: Toga II 4.0 release J Donald Fri Dec 29, 2017 8:39 am
      Re: Toga II 4.0 release Vael Jean-Paul Fri Dec 29, 2017 8:46 am
      Re: Toga II 4.0 release Tamás Kuzmics Fri Dec 29, 2017 9:22 am
      Re: Toga II 4.0 release Dr. Torsten Schoop Fri Dec 29, 2017 9:42 am
      Re: Toga II 4.0 release Eric Mullins Fri Dec 29, 2017 5:14 pm
            Re: Toga II 4.0 release Hermann Krause Fri Dec 29, 2017 5:27 pm
                  Re: Toga II 4.0 release J Donald Fri Dec 29, 2017 5:57 pm
                        Re: Toga II 4.0 release Hermann Krause Fri Dec 29, 2017 6:03 pm
      Re: Toga II 4.0 release macOS link Michael B Fri Dec 29, 2017 7:50 pm
            Re: Toga II 4.0 release macOS link J Donald Fri Dec 29, 2017 8:21 pm
      Re: Toga II 4.0 release J Donald Fri Dec 29, 2017 8:52 pm
      Re: Toga II 4.0 release Ed Schroder Sat Dec 30, 2017 11:49 am
            Re: Toga II 4.0 release J Donald Sat Dec 30, 2017 6:03 pm
                  Re: Toga II 4.0 release Ed Schroder Sat Dec 30, 2017 7:51 pm
                        Re: Toga II 4.0 release J Donald Sat Dec 30, 2017 8:26 pm
                              Re: Toga II 4.0 release AA Ross Mon Jan 08, 2018 6:53 pm
                                    Re: Toga II 4.0 release J Donald Mon Jan 08, 2018 9:13 pm
            Re: Toga II 4.0 release J Donald Fri Jan 05, 2018 7:34 pm
      Re: Toga II 4.0 release De Noose Daniel Sat Dec 30, 2017 7:27 pm
            Re: Toga II 4.0 release J Donald Sun Dec 31, 2017 7:08 pm
                  Re: Toga II 4.0 release De Noose Daniel Sun Dec 31, 2017 7:27 pm
            Re: Toga II 4.0 release Tamás Kuzmics Wed Jan 03, 2018 4:27 pm
            Re: Toga II 4.0 release J Donald Fri Jan 05, 2018 7:30 pm
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