Hi guys,
As @Jyotshnav123 pointed out, there were a few positions repeated in the old Friendly 217 file. Some had been present in older home-works and others were doubled in the Killer 217. Jacob has fixed them and I have just uploaded the new files.
So, if you have already downloaded the Friendly and Killer 217, please go to the homework pages and download them again!
Thank you for your understanding and apologies for the delay!