Tinapa 1.01

[Chris Formula]

a minor modification of Stockfish 1.8...

thanks to Tord, Marco and Joona for the well-commented top-notch source code/engine...

thanks also to Jim for the advice on compiling...

salamat,
chris

There is only one line change:

Code: Select all

// Null move dynamic reduction based on depth
-        int R = 3 + (depth >= 5 * OnePly ? depth / 8 : 0);
+        int R = 3 + (depth >= 9 ? 1 : 0) + (depth >= 15 ? 1 : 0) + (depth >= 21 ? 1 : 0) + (depth >= 27 ? 1 : 0) + (depth >= 33 ? 1 : 0) + (depth >= 39 ? 1 : 0);

Why do you think this single line change re null move reduction merits changing the name of the program? A code fork merits a name change if and when there's a significant modification of the code. This ain't anywhere close. Nevertheless, it's interesting.

Answer: To differentiate my modification from the versions being developed by the Stockfish team (of which i am not part of). Nevertheless, i recognized Stockfish as the base code (just like Crab). Regarding the "amount of code change" to affect naming of the program, i don't believe in that. Why? There are people who are minimalist... i.e. Pareto principle follower.

[Chris Formula]

Any plans on a 64bit release?

there is no plan at this time. however, the source code is publicly available to those who wish to make one.

[Chris Formula]

@ Eduard - thanks for sharing the settings.

@ mariaclara - masarap yan kapag merong kasamang kamatis at kalamansi..

[DaveD]

After any tests (games against Houdini) I prefer now fallow settings:

Code: Select all

[OPTIONS]
Mobility (Middle Game)=80
Space=80
Aggressiveness=80
Cowardice=80

Hi Ed. Thanks for these settings, i'm currently testing them. I also had an idea to combine your settings with the Stockfish 1.8 Tactical settings by LucenaTheLucid -
http://www.open-chess.org/viewtopic.php?f=7&t=366

Not enough games yet to be conclusive, but it looks very promising. Here are the settings for Tinapa 1.01
Tactical if someone want to try them -

Code: Select all

Check Extensions (pv nodes) = 0
Check Extensions (non pv nodes) = 0
Single Evasion Extension (pv node) = 0
Single Evasion Extension (non pv node) = 0
Pawn Endgame Extension (pv node) = 0
Pawn Endgame Extension (non pv node) = 0
Mobility (Middle Game) = 80
Space = 80
Aggressiveness = 80
Cowardice = 80
Everything else default.

Regards
Dave

[Eduard Nemeth]

After any tests (games against Houdini) I prefer now fallow settings:

Code: Select all

[OPTIONS]
Mobility (Middle Game)=80
Space=80
Aggressiveness=80
Cowardice=80

Hi Ed. Thanks for these settings, i'm currently testing them. I also had an idea to combine your settings with the Stockfish 1.8 Tactical settings by LucenaTheLucid -
http://www.open-chess.org/viewtopic.php?f=7&t=366

Not enough games yet to be conclusive, but it looks very promising. Here are the settings for Tinapa 1.01
Tactical if someone want to try them -

Code: Select all

Check Extensions (pv nodes) = 0
Check Extensions (non pv nodes) = 0
Single Evasion Extension (pv node) = 0
Single Evasion Extension (non pv node) = 0
Pawn Endgame Extension (pv node) = 0
Pawn Endgame Extension (non pv node) = 0
Mobility (Middle Game) = 80
Space = 80
Aggressiveness = 80
Cowardice = 80
Everything else default.

Regards
Dave

Hello Dave!

That is an very interesting idea from you!

Please test it! (I will test it too). Let me know the result of your test.

Thanks,
ED.

[Eduard Nemeth]

BTW: My own EN plus tactical idea would be this setting:

Code: Select all

[OPTIONS]
Mobility (Middle Game)=80
Space=80
Aggressiveness=80
Cowardice=80
Check Extension (PV nodes)=0
Check Extension (non-PV nodes)=0
Single Evasion Extension (PV nodes)=0
Single Evasion Extension (non-PV nodes)=0

My own first test sounds good!

ED.

[DaveD]

After any tests (games against Houdini) I prefer now fallow settings:

Code: Select all

[OPTIONS]
Mobility (Middle Game)=80
Space=80
Aggressiveness=80
Cowardice=80

Hi Ed. Thanks for these settings, i'm currently testing them. I also had an idea to combine your settings with the Stockfish 1.8 Tactical settings by LucenaTheLucid -
http://www.open-chess.org/viewtopic.php?f=7&t=366

Not enough games yet to be conclusive, but it looks very promising. Here are the settings for Tinapa 1.01
Tactical if someone want to try them -

Code: Select all

Check Extensions (pv nodes) = 0
Check Extensions (non pv nodes) = 0
Single Evasion Extension (pv node) = 0
Single Evasion Extension (non pv node) = 0
Pawn Endgame Extension (pv node) = 0
Pawn Endgame Extension (non pv node) = 0
Mobility (Middle Game) = 80
Space = 80
Aggressiveness = 80
Cowardice = 80
Everything else default.

Regards
Dave

Hello Dave!

That is an very interesting idea from you!

Please test it! (I will test it too). Let me know the result of your test.

Thanks,
ED.

Hi Ed. I am testing in a round robin tourney with Rybka 4, Houdini 1.02, Fire 1.3, Ivanhoe 55mU, and Stockfish 1.8 at 40/5. So it takes a lot of time to draw a definite conclusion. But so far, i am impressed, these settings are leading the tourney.

[DaveD]

Current standings of Top 10 in my unofficial rating list (EloStat - Start rating = 2800)

Code: Select all

    Program                 Elo    +   -   Games   Score   Av.Op.  Draws

  1 Tinapa 1.01 Tactical    2914  179 121    16    59.4%   2848   43.8%
  2 Ivanhoe 55mU            2870  114  64    37    54.1%   2842   54.1%
  3 Ivanhoe 57a4            2855   75  39    84    51.8%   2842   58.3%
  4 Rybka 4                 2853   47  28   202    52.5%   2836   51.5%
  5 Houdini 1.02            2850   56  32   149    51.3%   2840   53.0%
  6 Fire 1.3                2847   48  27   204    51.5%   2836   53.9%
  7 Stockfish 1.8 Tactical  2840   86  86    41    50.0%   2840   41.5%
  8 Stockfish 1.8           2832   39  68   102    48.5%   2842   52.0%
  9 Tinapa 1.01             2831   79 135    29    48.3%   2843   48.3%
  10 FireBird 1.1 Deeb       2821   45  92    56    47.3%   2840   62.5%

Time will tell if these promising results of Tinapa 1.01 Tactical continue.

Regards
Dave

[Hagen]

Imagine what the next version of Gargleblaster will do. Is that the new name being considered to replacing the Stockfish name?! It's horrible.

I'd prefer a better name than that...Little Bighorn.

[Swaminathan]

According to Luis Barutti (Who has actively tested Chessmaster personalities, and other engines)

• You can post the results, certainly.
  
  2 Rybka 4 w32 3282
  747 games
  
  3 Tinapa 1.01 1T 3257
  223 games
  
  4 Stockfish 1.7.1 JA 1T 3242
  437 games
  
  5 Rybka 3 1-cpu 32-bit 3238
  298 games
  
  6 Stockfish 1.8 JA 1T 3235
  535 games
  
  7 Naum 4.2 1T 3213
  410 games
  
  9 Critter 0.70 32-bit 1T 3189
  341 games
  
  10 HIARCS 13.1 SP 3141
  225 games
  
  11 Shredder 12 UCI 3139
  303 games
  
  All the best,
  Luis Barutti