most difficult achievement on chess.com

castle victory happens when you castle and the opponent is checkmated 

guys for this achievement  you will have to play players below the rating of 500  

because lower rated players do not resign

This game of myself will give you idea how to do it

https://www.chess.com/analysis/game/live/137875944732?tab=analysis&move=87

note : when you start the game request your opponent not to resign 

note : do not do stalemate