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I'm using this library and I couldn't find how to modify that value (skill). In any case, what I want is to be able to vary the level of difficulty of stockfish using python chess. Thanks.

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Send an UCI command Skill Level. Something like setoption name Skill Level value 10.

EDIT:

https://python-chess.readthedocs.io/en/v0.25.0/uci.html. Please look at setoption.

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  • HI. Yes i know that syntax but i dont know how implement it on python chess. :-( – 9acca9 Mar 15 at 16:57
  • Updated. Please give a try. – SmallChess Mar 15 at 17:11
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Thanks. With this syntax you can set the skill level:

engine.configure({"Skill Level": 7})

https://python-chess.readthedocs.io/en/latest/engine.html#options

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The simplest way I can think of is through a dilution method. You either get a weaker chess AI that you have created yourself or someone else has created and use that bot to dilute the stockfish bot.

for example a 35% stockfish 12 (~3500 elo) and 65% my custom chess ai (~1500 elo) would theoretically be 0.35 * 3500 + 0.65 * 1500 elo or 2200. This is just an estimate of level as chess elo progression isn't linear (i.e the difference between a 1000 and 1200 isn't the same as a 2000 and 2200)

The way the dilution occurs is by randomly picking which bot will make which moves. So 35% of moves will be made by stockfish 12 and 65% will be made by my bot.

if you want to increase or decrease the difficulty just adjust the the concentration of the two bots.

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