My second ever puzzle
I know, I don't think I could do it in a game. I wanted to make it B+B+K vs k as that's much easier but there is nothing stopping you promoting to knight and that was the move I wanted to force as I've never seen in a puzzle or game.
The promotion was the only move I had when I sat down in front of a empty board and tried to work out how to force it.
Whites to win, be careful not to get stalemate
Tell me what you think.