There was a thread about HJJ Go a while back, but not many people know that they also had a “review tool” that can generate reviews/comments for games played on HJJ Go. Here is an example of review
and when you click view answer, it would show a candidate move and “explanations” of it
And for lower-rank games, it functioned more like simple atari-checker, when a stone or group of stones are about to get captured (not just immediate atari, but also short of liberties, or in ladder/net), and for higher rank games, the “show answer” would often become show Best Variation (sort of differentiate suggestions based on strength)
However, the “explanations” for variations of higher rank games might be very lacking ("like simply stated “stronger/better” based on winrate)