Black Hole
May contain traces of nut
You got lucky and picked the right one 

Did I say it was difficult? Kurosus are not difficult, just some are more difficult than others (and never in accordance with their star rating).If you hadn't posted that it was difficult, I'd have said it was easy!
Did I say it was difficult?
Implied by the use of "!". (?)definitely 3-star!
I'm outraged...You got lucky
It puts an X in A1 and correctly fills a blank spaceAn X in A1 doesn't help.