Mate in under 20 moves / London system

I never stop wondering why so many players castle into a trouble position.

[@DavidPeriard]

Very nice

[@moosemaster13]

This is my go to checkmate in the lower ELOs. I have done this checkmate with your exact same last 5 moves about 20 times now. It's funny every time.

[@tobyn123]

Knight to E4 is an absolutely garbage move.