What do the numbers fx. Qex5 mean?


You'all sure it don't say Q x e5 ? X means captures, so Q takes the pawn on e5 would be my guess. OTOH folks are always complaining about the apps so maybe it's another bug and that's what you're seeing. I just use a computer. Here's a maybe helpful link:
https://www.chess.com/article/view/chess-notation---the-language-of-chess