I've been thinking about adding a game-analyse feature to my Tarrasch Chess GUI https://triplehappy.com https://triplehappy.com. I was toying with the idea of u

I've been thinking about adding a game-analyse feature to my Tarrasch Chess GUI https://triplehappy.com https://triplehappy.com. I was toying with the idea of using stockfish plus a poor engine as opposed to stockfish deep plus stockfish shallow. I was actually going to use my own Tarrasch Toy engine (about 1500 elo) as a reasonable proxy of a poor human player. My engine has fixed depth, so when set to very low depth will routinely just do the obvious thing and fall into simple fork traps etc., which would make it possible to auto generate simple explanatory variations like "Not $bad_move_played_by_my_engine because of $refutation_variation_pointed_out_by_stockfish." Like you I've noticed that often when looking at Engine Analysis the obvious human move doesn't appear as one of the first choices, which usually means there is an opportunity to get the machine to show you some tactics. So essentially your idea modulated by my assumption it would be difficult to get Stockfish to play sufficiently badly for stockfish deep plus stockfish shallow. But anyway, congrats to you for actually getting there first and making the idea work.