yeah!
HOW TO GET THE HIDDEN ACHIEVEMENT KILLER KING

fake game right?
real game: https://www.chess.com/game/live/83997593443?username=nyancat1923
They just played for fun! : )

how do i get it? i just played the game in analysis and i didnt get anything
you need to play a game with a person and checkmate them with your king!
how do i get it? i just played the game in analysis and i didnt get anything
you need to play a game with a person and checkmate them with your king!
then how do i get the other ppl to play the moves? i think they will think its a trap and wont listen to me

how do i get it? i just played the game in analysis and i didnt get anything
you need to play a game with a person and checkmate them with your king!
then how do i get the other ppl to play the moves? i think they will think its a trap and wont listen to me
well maybe i can play with you : )
do castling and castled rook gives a vertical check to the king opposite side of the board and if the king has nowhere to go then it's a checkmate. technically rook does the job but castling is a king move. so it's a Killer King.

I also won a game doing with my king, against a streamer as well with hundreds of viewers so that was pretty cool.
You can skip to the end for the checkmate

how do i get it? i just played the game in analysis and i didnt get anything
you need to play a game with a person and checkmate them with your king!
then how do i get the other ppl to play the moves? i think they will think its a trap and wont listen to me
I got it by luck. I forced my opponent to the correct position. Here is my game:
You’ve probably seen people have the achievement killer king. I’m going to give you a game that will give you this achievement.