Very difficult. White tries to get in the white square corner and black should try to forse it in the black squared corner, where it can be mated. Be carfull with every move and don't let the king escape. There is no sequence because the white king has a mind of its own. keep the 50 moves in mind.
Try to reach something like the position below. It has a closed line in the centre and from there you can force the white king to the side. and then the corner. Don't let it pass trough the centre and don't let it reach the oposite corner.
It would be really useful if someone would respond to this with a sequence chart demonstrating (and possibly describing) a forced checkmate with a Knight & Bishop. I have looked online on youtube and it was of little help. Thankyou.