1. Bg3 Kd4 2. Bf4 Kc4 3. Kc6 Kb4 4. Be5 Kc4 5. Be4 Kb4 6. Bd5 Ka3 7. Kc5 Ka4 8. Bc3 Ka3 9. Kc4 Ka4 10. Bc6+ Ka3 11. Bd4 Ka2 12. Kc3 Ka1 13. Kc2+ Ka2 14. Bc5 Ka1 15. Bb4 Ka2 16. Bd5+ Ka1 17. Bc3# 1-0
This is how I did it. It's been a while though so I'm sure I had a misstep. The bishop pair side by side cover a lot of squares. Imagine if the dark square bishop in the diagram above was on f4, you can see that they cover a ton of squares both ways which leaves the king no way to escape. With help from your king you keep making the area for the opposing king smaller and smaller until it is in the corner, then deliver mate. Watch for stalemates. Chessnetwork wil explain it better. Here is the link.
https://www.youtube.com/watch?v=uimbIq9h_7A
anyone have an easy method to nail this in the drills section?