If you input your own amateur-level chess games in PGN format and consult o1 about them, it provides a surprisingly decent high-level game analysis. It identifies the opening played, determines the pawn structures, comments on possible middlegame plans, highlights mistakes, and can quiet accurately assess whether an endgame is won or lost. Of course, as always, you should review o1's output and verify the statements, but there can be surprisingly (chess coach like) hints, insights, and improvement ideas that stockfish-only analysis cannot offer.