I have a simple question about how Chess engines like Stockfish and Leela value material. Do they use traditional material values (i.e. 1 for pawn, 3 for knight/bishop, 5 for rook, 9 for queen), or do they learn their own values through self-play?
This question (What relative point values of pieces do engines use?) suggests that Stockfish has unique material values, which are defined explicitly. However, those values appear hand-tuned, not learned. Would learned values potentially deviate greatly from our standard piece values?