Lichess has a series of puzzles you can try where underpromotion is the theme (which is unfortunately a major giveaway to solving these puzzles, since they othe

Lichess has a series of puzzles you can try where underpromotion is the theme (which is unfortunately a major giveaway to solving these puzzles, since they otherwise be rather hard to solve) https://lichess.org/training/underPromotion https://lichess.org/training/underPromotion