The ENGINES cannot find the winning move.. 23.Nh5+ ?


At least in, you'll notice it's sporting an older version of Stockfish plus, it is far slower than running it in your PC.


Stockfish 12 is plenty strong enough. On my 5-year-old, not very expensive desktop, Stockfish 12 found Nh5 in 29.5 seconds


Yeah, I don't think it has anything to do with overall engine strength.  Rather, its something related to engine settings and pruning.  Even when they run the analysis using your home computer/phone, and lichess are selecting engine settings that will work for older machines & phones.  We would need an engine nerd to really explain it to us, but it certainly is interesting what a big difference the settings make in certain positions.