rjlipton.wordpress.com describe a heads heads/tails coin problem on 2016-02-21. They'll state whether the problem is decidable in their next post.

Created by whosyourjay on 2016-02-26; known on 2016-02-28; judged wrong by Sniffnoy on 2016-02-29.

• whosyourjay estimated 50% on 2016-02-26
• Sniffnoy   judged this prediction wrong on 2016-02-29.