Feature request: collaborative solving

[purpleshiny]

I like to solve cryptics with a friend, we enjoy the Daily Globe and Mail ones because there's a "play together" feature. It would be lovely if this was available in Crosshare! Have you thought about adding that capability?

[mdirolf]

I think that's a good idea. Similar to #100

[wmesard]

Collaborative solving is one thing that squares.io does really well. Suggest looking their for inspiration on the user-experience.