Lots of possibilities, and the right one took a bit to find! Lots of ways to be quite far off! Took me a while to find the way through Fiiiinally solved it, although demoted to Grandmaster in the process. Found so many 150 variations along the way. Crazy level! 10 moves off, and not sure I have the right exit.
EDIT: 2 moves now Wow, took me a while to see Took me forever to cut 2! Whoa, didn't see that at all, neat
EDIT: Tricked me again, 15 years later