walmart sells chain tools for 2 or 3 bucks... they dont last long, maybe 20 uses or so, but the price is right and easy to use. The way they work is the chain lays in a kind of saddle and theres a T bolt that you tighten on one of the link pins. It forces it out a little at a time with each turn. DO NOT REMOVE THE PIN ALL THE WAY!!! Get it out just enough to split the chain. Even if you have to turn it a little-then check it- then turn it a little... This way you can reuse if needed. Its really easier than it sounds.Find a donor chain to practice on if needed. I like to put a master link in mine when I re-install.