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H. G. Muller wrote on Sat, May 21, 2022 08:18 AM UTC:

I now also upgraded the general Diagram script to get more realistic piece values for this variant. It had a rather complex algorithm for determining the contribution of promotability to the piece value. Which would determine the ease of promotion based on counting the fraction of moves that would enter the promotion zone in (randomly generated) test positions, and assume the product of this ease and the promotion gain would determine the probability that this piece would indeed promote during the game. (Assuming that pieces with a less attractive promotion prospects would have to be traded away to clear the way for that.) This of course gave rather non-sensical results if there was no promotion zone at all. In that case the Diagram now assumes promotion on capture for promotable pieces (as specified by maxPromote). It then adds 50% of the promotion gain if this is positive, and subtracts 10% of the devaluation if it is a demotion (assuming there are ways to avoid it, but that this avoidance does make the piece less useful).


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