So it's mostly useful for problems of moderate solvability, that you could solve without the power, given a considerable effort (but not more effort than you would be willing to actually put forth).
For example, you could set Hashcash to mint some expensive stamp, and firmly decide to check its output in three days.
(For those who don't want to take the time to read the link, Hashcash is a proof-of-work system based on brute-force partial preimage attacks against hash (one-way) algorithms.)
In the vein of the Harry Potter and the Methods of Rationality discussion threads this is the place to discuss anything relating to Alicorn's Twilight fanfic Luminosity. The fanfic is also archived on Alicorn's own website <strike>(warning: white text on black background)</strike>.
Previous discussion is hidden so deeply within the first Methods of Rationality thread that it's difficult to find even if you already know it exists.
Similar to how Eliezer's fanfic popularizes material from his sequences Alicorn is using the insights from her Luminosity sequence.
Spoilers for the fanfic itself as well as the original novels need and should not be hidden, but spoiler protection still applies for any other works of fiction, except for Harry Potter and the Methods of Rationality chapters more than a week old so we can freely discuss similarities and differences.
EDIT: Post-ginormous-spoiler discussion should go to the second thread. (If you have any doubt on whether you have reached the spoiler in question you have not.)