Knight takes Knight

Tonight I played another game of chess against Ghosted Bot and I must say; "the computer was putting up a fight" till I took his knight using my knight after I promoted my pawn for a queen. I then moved my knight out of the way to deliver a checkmate to the king since my rook wouldn't allow white's king to escape from my new attack checkmate, which someone else might of played in the past in a similar scenario or game, since it's not like invented it?

I recall playing a similar game, only I moved my bishop out of the way of the king instead to deliver a checkmate, but this move highlights how I play chess sometimes psychologically.