When I'm breaking a chain with a master link (to remove the chain from the bike), usually I can do it with my hands by pushing the links together until the master link comes apart. But sometimes it's trickier than others, and can be a recipe for sore thumbs.
I know there are special tools that help with this, but I'm curious if there's a trick I'm missing.
What is an easy, reliable way to un-do the master link (even when stuck), without any specialty master-link-specific tools?