Roped solo climbing

Roped solo climbing or rope soloing is a form of solo climbing without a climbing partner, but with the safety of rope protection.

Roped soloing is much less dangerous than free soloing but more dangerous than climbing with a partner. One problem is that in a fall, the attachment system is loaded in a way it wasn't designed for. Also, in case of an accident, sometimes there is no one to go for help. It can also be tedious, as the climber must ascend each section of rock twice: once to add the next belay anchor, then again after descending to remove the previous one, effectively traveling the route three times.

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Wikipedia