When I try to solve this puzzle it stalls at the move Bxf2
lichess.org/training/77241@blackzombie Are you using a modern browser like microsoft edge, chrome, or firefox?
I'm using chrome. Not the newest version but it has worked before.
With firefox it works. With chrome 49.0.2623.112 it doesn't work. Is that browser too old?
Chrome 49 is from March 2016. I don't think lichess is particulary interested in supporting browsers that are older than one year.
