To my opinion, it shouldn't be possible to see others' problems knowing diagram's number. But it would be good to have an option of sharing a problem with others. What I'd suggest is to have the following options for a problem: 1) to share it with another user(s) of the system with no-edit possibility; 2) to share it with another user(s) of the system with edit possibility - in case of joint composing work; 3) to share with all users or to make it "public" (with no edit option) - for browsing, searching,etc. - this is in a case if public database is planned to be. In addition to SHARE option I'd like to have a MOVE option. It would be useful for a problems which are entered by a user (not the author of the problem) on purpose (submitting to competition, adding to the database etc) - for not keeping it in [MyProblems] at all, but sending/moving to the "destination". Ready to test!
To my opinion, it shouldn't be possible to see others' problems knowing diagram's number. But it would be good to have an option of sharing a problem with others. What I'd suggest is to have the following options for a problem: 1) to share it with another user(s) of the system with no-edit possibility; 2) to share it with another user(s) of the system with edit possibility - in case of joint composing work; 3) to share with all users or to make it "public" (with no edit option) - for browsing, searching,etc. - this is in a case if public database is planned to be. In addition to SHARE option I'd like to have a MOVE option. It would be useful for a problems which are entered by a user (not the author of the problem) on purpose (submitting to competition, adding to the database etc) - for not keeping it in [MyProblems] at all, but sending/moving to the "destination". Ready to test!