i sacraficed my bishop and knight in hope that he wouldn't know how to mate with bishop and knight but none the less :
lichess.org/w7Z0ACJy8C4FUh Oh. Wow I've never seen a bishop and knight mate before, thanks for sharing. This also further proves not to play hope chess lol.
You chose the wrong colored corner. Around move 50, you should've gone toward a8 and make him prove he can do it. It takes at least 30 moves.
ıf you choose good corner
black need allow white king to escape
after you will get checkmated ( but not quickly)
