maybe for king of the hill?
killer King Achievement

How did you checkmate with a king?
Look like post 28 did it with a discovered checkmate by moving the king.
https://www.chess.com/live/game/4844197311
How did you checkmate with a king?
Look like post 28 did it with a discovered checkmate by moving the king.
https://www.chess.com/live/game/4844197311
The achievement doesn't exist yet