Puzzle - white has a checkmate.

The solution is here - https://www.chess.com/analysis/game/live/120785379743?tab=analysis&move=59 - check top of the right sidebar.

I started trying something new when I watch speed chess.

1. Sometimes I watch players stronger than me but not too much stronger than me.
2. I keep the evaluation bar off so I'm forced to think without hints. I'm way too addicted to the elav bar.