How to get the hidden achievement Killer King 😃

You have probably looked at other peoples awards and seen the achievement Killer King. This is a hidden achievement very hard to unlock. Sometimes, rarely, someone will accidentally get this award but not likely.It is unlocked by discovered check from moving your king out of the way. This means that you move your king and then it is checkmate.

Here is a game that if played should give you the Killer King achievement.                                         ( Not the most simplified way)