Out at the weekend and the chain started skipping on the rear cassette when I put any significant pressure down. A few miles later, going up a hill - "snap" and the chain broke into three parts. I know chains don't snap. What happened was that one of the links, that I had previously joined together with a chain tool had bent a little and finally separated itself from the rivet. At the same time, the nearby quick link came undone and separated. So chain in three parts, with a bent outer plate. Fortunately, had my link remover with me and I was able to straighten the bent link and then re-joined the broken link. The quick link, which I almost lost in the gutter, I was able to find and rejoin and with the chain back in one piece, slowly rode back home. A new chain purchased and waiting to be fitted. Moral of the story - I was brought up just using a chain tool to cut and rejoin a chain and have always found the quick links fiddly to use. On my 1/8th & 3/32 chains, the chain tool works fine, but I think I will now just accept that for a 10 speed chain you have to use a quick link, although the chain tool will get you home if a roadside repair.