I think that you are suppose to saw the tree while it is still green, not after being down for two years. Gets a little hard to cut, assuming that the chain is sharp.
So ten feet cut, another eighty to go, and I didn't even have to bring it down. (from the stump that was shown earlier)
""The world is full of obvious things which nobody by any chance ever observes…""
— Arthur Conan Doyle
“The Hound of the Baskervilles”
""Mathematics...