There are few comments here: https://www.reddit.com/r/ethereum/comments/2l0ht4/alternative_proof_of_work_system_based_on_sat/ https://www.reddit.com/r/ethereum/

There are few comments here: https://www.reddit.com/r/ethereum/comments/2l0ht4/alternative_proof_of_work_system_based_on_sat/ https://www.reddit.com/r/ethereum/comments/2l0ht4/alternativ..., but seems unlikely that was the entirety of the discussion.