IIRC, the achievement was for if a participant reached one of the goals.
You made it it on a smaller puzzle. Very cool
Congrats on the achievement.

Not one that I will ever attain.

I was fixing a bug with the "speed demon" achievement check yesterday, I'll check what happened in your case.
(you need to get the time for each size)

edit: I introduced a silly bug: it checks if the time is below the limit, and not equal to zero. I figured I can
remove the zero check, because the database query already did this. I forgot that if there are _no_ times in the
database, it also returns zero

(I finally got mine yesterday, with a 2:31 on the 8x8 )

OK, I see: it's your revenge for my neverending nitpicking
And here's just another remark: achievements like MEGALOMANIAC should have a progress bar, so that users can keep track of how much is left.
This is what it looks like in MS Solitaire (it says, 8 bronze badges out of 12; 8 silver badges out of 10).
// Sorry about the screenshot being all Russian; I can't switch the language.

Yes, that is on the todo list. It has to be done in any case,
because the query to get the current count takes too long

And shouldn't the achievement be to solve 12 12x12 on the day of publication?

Yes, that's the condition.

A progress counter has been added (though everyone started at zero )

edit: ah, only now I see you put twelve. Good idea

I should have bolded.

I got tired of the self imposed pressure and stress of completing all of the puzzles everyday. Even though I was retired, I got a part time job and set a "reasonable" target of 45 points per day. I have a more balanced and sane life now.

That’s a very sensible approach and one that I should adopt. I’ve been doing some part time lecturing of late and this should be enough of a mental challenge for me. But I haven’t quite been able to let go just yet.

My counter is showing as 1/10. I thought the target was 12 and I’ve solved all 8 12x12s so far this year on the day of publication.