Obtain 50 solvers for a problem you have created
Awarded to Michael Haderlein on 15 Oct 2022
Publish your first review
Awarded to Michael Haderlein on 09 Oct 2019
Contribute at least one answer each month for 3 consecutive months
Awarded to Michael Haderlein on 20 Jul 2017
100 of your answers have been accepted
Awarded to Michael Haderlein on 20 Jul 2017
Provide your first answer ever to someone else's question
Awarded to Michael Haderlein on 20 Jul 2017
Create a problem
Awarded to Michael Haderlein on 05 Feb 2015
Solve a problem for the first time
Awarded to Michael Haderlein on 02 Feb 2012
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