I forgot about the cross indicating a "liked" puzzle......so wish to convey that I did like both 7x7's today .....why no one corrected stocks for puzzles is beyond me

Nods yes Beaker: It comes and goes too quickly

I'm still getting used to it existing but it might be helpful to add it next to the "(Note that you've already solved this puzzle)" or somewhere else on the page because I've missed it a few times too.

Yes, to make it still available, as long as you've solved the puzzle, makes sense, thanks.

Forgot another one , this being the medium 8x8!!

And another......the multiplying 8x8

Forgot one too: I really liked today's difficult 6x6

I'm not sure that I especially liked today's (8/27) 8x8 difficult but I did think that it was unusually difficult for its type.

I find myself liking every difficult puzzle I solve simply because I am filled with feelings of success (reinforced by the endorphin rush of finally seeing the familiar all-green puzzle ), so my "like" becomes more a reflection of my ability than whether the puzzle is intrinsically interesting or clever. If the purpose of liking puzzles is to train an AI to design better puzzles, I suspect my contributions are not helpful.

Good point, and interesting idea (train the software to design better puzzles).

A first idea was just to know more about which are the favourite puzzles. Are there puzzles
which are almost never liked, for example?

Another could be to put the most liked puzzles in the newsletter / a book / etc.