Engine personalities for Houdini 1.5

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Topic The Rybka Lounge / Computer Chess / Engine personalities for Houdini 1.5

By Uly

Date 2011-10-16 20:25

Courtesy of Richard Vida!

Cross post from: http://www.open-chess.org/viewtopic.php?f=3&t=1667

'For advanced users who don't mind some hex-editing...

1. Open Houdini executable in your favorite hex editor.
2. Search for ASCII string (NOT hex values): 5D717974912A20202020202020202020202020202020202020202020202020202020202020
3. Adjust weights to your preferences ;)

This string is a vector of 2 digit hex numbers with evaluation adjustments. First 6 values are material related and are in centipawn units. Rest are feature weights in units of 1/32.

Meaning of the entries:


entry #    default value    description

                            Material values:

   01      0x5D             pawn value
   02      0x71             knight value minus 200
   03      0x79             bishop value minus 200
   04      0x74             rook_value minus 375
   05      0x91             queen_value minus 850
   06      0x2A             bishop pair value

                            Eval weights (in steps of 1/32):

   07      0x20             static weight pawn 
   08      0x20             static weight knight
   09      0x20             static weight bishop
   10      0x20             static weight rook
   11      0x20             static weight queen
   12      0x20             static weight king
   13      0x20             pawn island
   14      0x20             pawn hole
   15      0x20             pawn doubled on closed file
   16      0x20             pawn doubled on semiopen file
   17      0x20             pawn doubled & isolated on closed file
   18      0x20             pawn doubled & isolated on semiopen file
   19      0x20             pawn isolated on closed file
   20      0x20             pawn isolated on semiopen file
   21      0x20             pawn backward on closed file
   22      0x20             pawn backward on semiopen file
   23      0x20             candidate passed pawn
   24      0x20             passed pawn base value
   25      0x20             passed pawn protected
   26      0x20             passed pawn outside
   27      0x20             passed pawn connected
   28      0x20             pawn: king distance
   29      0x20             passed pawn: friendly king distance
   30      0x20             passed pawn: opposing king distance
   31      0x20             pawn shield outer file
   32      0x20             pawn shield inner file
   33      0x20             pawn shield middle file
   34      0x20             pawn shield diagonal   
   35      0x20             pawn storm outer file
   36      0x20             pawn storm inner file
   37      0x20             pawn storm middle file

Have fun

Richard'

By Chaotic Chess (****)

Date 2011-10-17 01:41

........................,,-~*~,,
......................./:.:.:.:.:.|
......................|;.;.;.;.;./
......................|.;.;.;.;.|
............._,,,,,_.).;.;.;.;.|
.........,,-":.:.:.:."~-,;.;.;.|
........(_,,,,---,,_:.:.);.;.;..",,
......,-":.:.:.:.:.""-,,/;.;.;.;.;.",
.....(:.__,,,,,,,,,___);.;.;.;.;.;|
...../"":.:.:.:.:.:.:¯""\;.;.;.;.;.,"
....\",__,,,,,,,,,,,__/;;;;;;;;;/\
.....\.::.:.:.:.:.:.:.;.);;;;;;;;;/:\
.......\,,,,,---~~~~;;;;;;;;,"::::\
.........."""~~--,,,,,,,,,,-"::::::::::\
...................\::::::::::::::::::::::\

Like!

By BankShots (***)

Date 2011-10-19 14:40 Edited 2011-10-19 14:44

> ........................,,-~*~,,
> ......................./:.:.:.:.:.|
> ......................|;.;.;.;.;./
> ......................|.;.;.;.;.|
> ............._,,,,,_.).;.;.;.;.|
> .........,,-":.:.:.:."~-,;.;.;.|
> ........(_,,,,---,,_:.:.);.;.;..",,
> ......,-":.:.:.:.:.""-,,/;.;.;.;.;.",
> .....(:.__,,,,,,,,,___);.;.;.;.;.;|
> ...../"":.:.:.:.:.:.:¯""\;.;.;.;.;.,"
> ....\",__,,,,,,,,,,,__/;;;;;;;;;/\
> .....\.::.:.:.:.:.:.:.;.);;;;;;;;;/:\
> .......\,,,,,---~~~~;;;;;;;;,"::::\
> .........."""~~--,,,,,,,,,,-"::::::::::\
> ...................\::::::::::::::::::::::\
>
>

..........................~^~
......................../:   .:|
.......................|; ;.|
.......................|.; ;.|
.......................). ..\
.........,_____/____,;.;.   ::\
........() ** );. :::\
......,..)----------<;.;.;. ::|
.....()    *** );. ;;|
.......)-----------<;.;.;.;.;,"|
......()    ***    );; -|\
........)----------<;;    /:::\
..........(__**____)____../;;;,:;;,\
............................\:::::::::;;:::::::\
..............................|::::::::::;;;::::::\

:grin:

By siah

Date 2011-10-20 03:52

Try one with mid finger. :grin:

By Master Om (Bronze)

Date 2011-10-17 08:13

Hey!! uly how to adjust weights!!!
I found the string in XVI32 then ?

By Eelco de Groot (***)

Date 2011-10-17 13:40 Edited 2011-10-17 13:53

You will need a Hex editor if you have not used that, it should work with other editors too I think, but these are specifically for this purpose. It is just a sort of word processor but it reads out the hexadecimal values. I think there should be a row of values 0x20, that is 32. In this case I believe Richard stated it is really an ASCII string. Simply change a value in that ASCII string and save the new file, should work. E.g. changing 20 to 30 would be a value of 3 x 16 = 48, an increase of 50% in this value. Or A0 would be 160 according to the Windows calculator. Store string. Voila, a new Houdini is born :razz:

Eelco

By Master Om (Bronze)

Date 2011-10-17 14:33

I used this editor called XVI32.

Thanks for explanation.

By imran Date 2011-10-17 08:42

Thanks,Uly.Now I can have an insane Houdini :evil:

By Banned for Life (Gold)

Date 2011-10-24 14:35

What's next? Will Robert H. be posting on how to change Critter's evaluation weights?

By Master Om (Bronze)

Date 2011-10-18 11:59

So I made one. Any one test these ?

Attachment: Houdini1.5xx64OM.7z - Houdini (245k)