Obsidian ContemptOverrides

[peter]

Can anybody please tell me, how this feature works? Gemini says 3 numbers in plain text are to be set as values for opening, midgame and endgame, separated by spaces. No error message in console with e.g.

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setoption name ContemptOverrides value x y z

, neither with separation by ; nor by :
but no differences in output- eval (nor with command "eval") to be seen, differently to the effect of changes in other one Contempt- option to be set separately, e.g.

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setoption name Contempt value 100
Contempt updated to 100

gives confirmation in console and higher eval in output.
Thanks in advance, regards

[Ajedrecista]

Hello Peter:

FWIW, I found five overrides (two of them ContemptOverrides) at src/ucioption.cpp:

Obsidian/src/ucioption.cpp at main · gab8192/Obsidian · GitHub

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[...]

void refreshContemptImpl() {
  [...]

  std::string overrides = Options["ContemptOverrides"];

  if (uciOppString.empty() || overrides.empty())
    return;

  [...]

  std::stringstream ss(overrides);

  [...]
}

[...]

void init() {

  [...]
  Options["ContemptOverrides"] = Option("", refreshContempt);
  [...]

}

[...]

I hope you will understand something... me not. Good luck with your request!

Regards from Spain.

Ajedrecista.

[peter]

I hope you will understand something... me not. Good luck with your request!

Thanks for the trial, Jesus, even if it's not much clearer to me now, as for the syntax of the command in console or GUI to set up the option of the already compiled binary, than it was before. Anyhow, Gemini, as told, didn't make it to commit to this one syntax neither, "reading" the source code too

[peter]

Logged in at github, Copilot there tells me so:

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setoption name ContemptOverrides value white=24,black=0,analysis=0,off=0

was one example of a correct syntax.

Explanation of the names and values:

white=24 – Apply contempt of +24 when playing against an opponent named "white"
black=0 – Apply contempt of 0 when playing against an opponent named "black"
analysis=0 – Apply contempt of 0 when the opponent is "analysis"
off=0 – Apply contempt of 0 for any other opponent (the fallback/default case)
If none of these opponent names match the UCI_Opponent setting, the base Contempt option value is used instead of the overrides.

Max. values were the same as in Contempt- parameter (512), no negative values accepted, regards