Open Source Blitz: DoubleCheck 2.5.4 (+83 elo!)

[lucasart]

Just a couple of apparently small bugfixes... Seem to have a huge effect on playing strength, as those were related to the evaluation of passed pawns, which is one of the most important part of an eval IMO. This version will soon appear on WBEC, just need to make a few cosmetic but non functional changes

Ratings

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Rank Name                  Elo    +    - games score oppo. draws 
   1 Critter 1.4          3243   32   31   400   76%  3023   30% 
   2 IvanHoe 999946h      3182   31   30   400   67%  3039   33% 
   3 Stockfish 2.2.2      3177   29   29   450   68%  3027   29% 
   4 Protector 1.4        2924   28   28   500   49%  2932   23% 
   5 Umko 1.2             2868   26   25   600   53%  2854   26% 
   6 Toga 1.4.1           2853   24   24   700   57%  2806   24% 
   7 Glaurung 2.2         2824   31   31   400   35%  2961   28% 
   8 Daydreamer 1.75      2745   24   24   600   59%  2677   30% 
   9 Fruit 2.1            2700   22   22   700   51%  2695   25% 
  10 Crafty 23.4          2670   25   25   550   45%  2709   23% 
  11 Cheng3 1.07          2657   26   26   500   54%  2630   25% 
  12 Arasan 13.4          2648   24   24   600   49%  2653   21% 
  13 GNU Chess 5.07.173b  2647   23   24   600   47%  2670   28% 
  14 Rodent 0.10          2637   24   24   600   56%  2594   25% 
  15 Scorpio 2.7          2631   21   21   750   45%  2671   27% 
  16 Pepito 1.59          2595   23   23   650   51%  2585   23% 
  17 Sloppy 0.2.2         2545   22   22   750   41%  2610   24% 
  18 EXchess 6.10         2542   24   24   650   59%  2463   23% 
  19 DoubleCheck 2.5.4    2542   24   24   700   61%  2451   16% 
  20 Greko 9.0            2485   22   22   750   39%  2571   23% 
  21 Pawny 0.3.1          2470   26   26   550   49%  2481   18% 
  22 Olithink 5.3.0       2370   28   28   450   48%  2381   21% 
  23 Sungorus 1.4         2328   26   26   550   38%  2419   21% 
  24 Jazz 501             2298   28   29   450   39%  2389   20% 
  25 Ifrit m1.5           2298   32   32   350   43%  2354   20% 
  26 Beowulf 2.4          2234   33   34   350   33%  2373   17% 
  27 KMT Chess 1.2.1      2233   33   34   350   33%  2373   18% 

Conditions
* Open Source and Portable engines only: no closed source, commercial, or windows only programs.
* Copyleft: Ideally licensed under the GNU GPL, or with copyright restrictions that are not excessive.
* 1min+1sec/move, 64 MB Hash, 1 Thread, 64-bit, Ponder off, no EGTB.
* 8 book moves: neither to little, nor too much. Allows engines to develop their own plan, while offering a large enough number of opening positions.
* Bayeselo, offset Fruit 2.1 = 2700 elo.

[lucasart]

I've just realized that 1'+1" is bullet rather than blitz. I'll change the name of this list to "Open Source Bullet" next time.

But what is the official limit between bullet and blitz ? Is 2'+2" still bullet or is it blitz ?

[Leo_D]

Thanks Lucas,

DoubleCheck v2.54 is available now:
http://wbec-ridderkerk.nl/html/newspage.htm

Best wishes,
Leo.

[lucasart]

Thanks Lucas,

DoubleCheck v2.54 is available now:
http://wbec-ridderkerk.nl/html/newspage.htm

Best wishes,
Leo.

You're welcome

I can't wait to see how it scores in the final of the 5th division of WBEC.

[Ferdy]

I've just realized that 1'+1" is bullet rather than blitz. I'll change the name of this list to "Open Source Bullet" next time.

But what is the official limit between bullet and blitz ? Is 2'+2" still bullet or is it blitz ?

ICC Help: etime

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"etime" is the initial time plus 2/3 the increment. E.g. a 2 12 game has an "etime" of 10, while a 5 0 game has an etime of 5. The idea is this is the time (in minutes) available if the game goes 40 moves.

  "bullet"   -- Games with etime less than 3.   
  "blitz"    -- Games with etime less than 15 and greater than or 
                equal to 3.
  "standard" -- Games with etime greater than or equal to 15.

For 2+2 that could be blitz

[Graham Banks]

Thanks Lucas,

DoubleCheck v2.54 is available now:
http://wbec-ridderkerk.nl/html/newspage.htm

Best wishes,
Leo.

You're welcome

I can't wait to see how it scores in the final of the 5th division of WBEC.

Any chance of a 32-bit version of each release Lucas?

[lucasart]

Thanks Lucas,

DoubleCheck v2.54 is available now:
http://wbec-ridderkerk.nl/html/newspage.htm

Best wishes,
Leo.

You're welcome

I can't wait to see how it scores in the final of the 5th division of WBEC.

Any chance of a 32-bit version of each release Lucas?

I guess I could do it. I'm just very lazy
All I need to do is install a couple of packages for my gcc/mingw to produce linux/windows 32 bit executables. I'll have a look and see if I can do a 32 bit windows compile.

Otherwise Jim Ablett compiles DoubleCheck. The last JA version is 2.5, but it's probably best to wait for 2.5.4 JA as 2.5.4 is significantly stronger than 2.5, if you want to do any testing.