Nah. Not yet. My skills have worsened over the years.
Killer KING, Castle MATE, Puzzle ADDICT: The Hardest Achievement!

It's not too hard. I played a match against my friend, I was winning and made it into a ladder mate with my king in front of the rook, and bam. An excellent way to torture your friends if you ask me .

That's wrong the hardest achivement is checkmate by castling.
its not that hard I have did this castle checkmate in my old chess.com id

bro there is not something like that
Yes bro there is a achievement like that check it
Has anyone of you Completed these Achievement?