One example is the following game, first played in 1922. For those with a keen eye for tactics will instantly spot the idea that occurs on move 9, but the question is whether you can make it work all the way to the end. Fortunately for Dr Imbaud the game was played by correspondence, so he had plenty of time to work it out. These days a program like Stockfish can justify the queen sacrifice in around a minute (at least on my slow computer), but it needs to see at least 11 moves (22 ply) before it accepts that it works.
Imbaud - Strumilo [B02]