Moustique 0.4

[Roland Chastain]

Hello!

Moustique (JS Schach UCI) version 0.4 is available.

Since the previous release, the code has been polished and optimized. The engine plays exactly like the previous version (I believe), but faster and using less memory.

There are Linux and Windows binaries, but only Linux binaries have been tested.

Regards.

Roland

[Roland Chastain]

Moustique 0.4.1 is available.

Changes:

• Support command position fen ... moves ...
• Fixes in Book unit

Now the program plays a random move from the book, instead of always playing the best move.

No Windows binaries for now. If you need it, you can build it like this (with Free Pascal):

Code: Select all

fpc -Mobjfpc -Sh moustique.pas -dRELEASE -CX -XX -Xs

Otherwise you can also use the included Lazarus project.

[Gabor Szots]

Hi Roland,

Have you abandoned Alouette altogether?

[Roland Chastain]

Hi Gabor. No, I didn't abandoned it. I will try to propose a new version in 2023.

[Roland Chastain]

Uploaded a Windows binary.

[Gabor Szots]

Is this also without time control?

[Roland Chastain]

Is this also without time control?

Yes.

The code having been optimized (some variables removed), maybe I could try to increase the search depth and add a time control. But I am not sure that it work, because the best move search is recursive.

I have to test how the program behaves if we increase search depth. (It's possible to do that by editing the INI file.)

[Gabor Szots]

Is this also without time control?

Yes.

The code having been optimized (some variables removed), maybe I could try to increase the search depth and add a time control. But I am not sure that it work, because the best move search is recursive.

OK, thanks.

[Roland Chastain]

I have to test how the program behaves if we increase search depth. (It's possible to do that by editing the INI file.)

A first test, with mindepth or maxdepth increased by 1. Cute Chess options: tc=40/60 timemargin=10000.

Code: Select all

480 game(s) loaded, 0 game(s) with unknown result ignored.
Rank Name                                  Elo    +    - games score oppo. draws 
   1 Moustique 0.4.1 32-bit [mindepth 4]    32   29   29   192   58%    -8   72% 
   2 Moustique 0.4.1 [mindepth 4]           29   29   29   192   57%    -7   76% 
   3 Moustique 0.4.1 32-bit [maxdepth 8]   -11   29   29   192   47%     3   74% 
   4 Moustique 0.4.1 [maxdepth 8]          -23   29   30   192   45%     6   67% 
   5 Moustique 0.4.1                       -26   29   29   192   43%     7   74% 

Many games lost by illegal move for engines with mindepth=4.

Code: Select all

+================+======+=====================================+=======+
| File           | Game | Engine                              | Move  |
+================+======+=====================================+=======+
| 20230105131150 |   11 | Moustique 0.4.1 32-bit [mindepth 4] | 0000  |
| 20230105131150 |   24 | Moustique 0.4.1 [mindepth 4]        | 0000  |
| 20230105131150 |   44 | Moustique 0.4.1 32-bit [mindepth 4] | 0000  |
| 20230105131150 |   46 | Moustique 0.4.1 [mindepth 4]        | 0000  |
| 20230105131150 |   49 | Moustique 0.4.1 32-bit [mindepth 4] | 0000  |
| 20230105131150 |   78 | Moustique 0.4.1 32-bit [mindepth 4] | 0000  |
| 20230105131150 |   87 | Moustique 0.4.1 [mindepth 4]        | 0000  |
| 20230105131150 |  144 | Moustique 0.4.1 [mindepth 4]        | 0000  |
| 20230105131150 |  174 | Moustique 0.4.1 [mindepth 4]        | 0000  |
| 20230105131150 |  176 | Moustique 0.4.1 [mindepth 4]        | 0000  |
| 20230105131150 |  181 | Moustique 0.4.1 32-bit [mindepth 4] | 0000  |
| 20230105131150 |  196 | Moustique 0.4.1 [mindepth 4]        | 0000  |
| 20230105131150 |  218 | Moustique 0.4.1 32-bit [mindepth 4] | 0000  |
| 20230105131150 |  236 | Moustique 0.4.1 [mindepth 4]        | 0000  |
| 20230105121706 |   41 | Moustique 0.4.1 32-bit [mindepth 4] | 0000  |
| 20230105121706 |   42 | Moustique 0.4.1 [mindepth 4]        | 0000  |
| 20230105121706 |   54 | Moustique 0.4.1 32-bit [mindepth 4] | 0000  |
| 20230105121706 |   94 | Moustique 0.4.1 32-bit [mindepth 4] | 0000  |
| 20230105121706 |  144 | Moustique 0.4.1 [mindepth 4]        | 0000  |
| 20230105121706 |  171 | Moustique 0.4.1 32-bit [mindepth 4] | 0000  |
| 20230105121706 |  214 | Moustique 0.4.1 32-bit [mindepth 4] | 0000  |

Maybe the algorithm doesn't like even numbers?

The '0000' move comes from here:

Code: Select all

// player.pas
function TChessPlayer.BestMove(out ACode: TExitCode): string;
// ...
var
  // ...
  i: integer;
begin
  result := '0000';
  i := FCurPos.BestEval(FCurPos.ActiveColor, 1, 32000);
  i := BestMoveIndex(i);
  if i > 0 then
  begin
    // ...
  end else
    ACode := ecError;