Metaculus lets you write private questions. Once you have an account, it’s as simple as selecting ‘write a question’ from the menu bar, and then setting the question to private not public, as a droplist in the settings when you write it. You can resolve your own questions ie mark them as yes/no or whatever, and then it’s easy to use Metaculus’ tools for examining your track record, including Brier score.
Metaculus lets you write private questions. Once you have an account, it’s as simple as selecting ‘write a question’ from the menu bar, and then setting the question to private not public, as a droplist in the settings when you write it. You can resolve your own questions ie mark them as yes/no or whatever, and then it’s easy to use Metaculus’ tools for examining your track record, including Brier score.