Keeping a secret
Same day, May 20. The author wants an easier block after a hard run, and the post says exactly how this one works. Four words, three of them in brackets. Swap the three for one word, then turn the two words into one solution.
The question: (intentionally keeping secret) ring. The TOMI field is three words, "the last one of them is anagram". Not "an anagram". Just "anagram", and the author insisted on that.
The hints came fast and furious, the author's own words. The bracket is "one of the meanings of the word". The word is "neither very common nor very unusual". The solution is an anagram of the other two TOMI words, and ring is the second of them.
The capital that wasn't
Then u/mapl3sn0w asked about capitalization. Fair question. The answer: TOMI all lower case, solution with the first letter only in upper case, "like this example: Upper".
Wrong. The secret keeper is coy, and coy ring rearranges to grycoin. Lower case. The claim confirmed at 06:46:58 UTC on May 21. A while later u/Crypto_Rachel posted the string grycoin TOMI coy ring anagram, the address and the key. "I thought you said the solution was upper :(" Ouch.
The author called it the first mistake of the second run. A mistake means a 77 mBTC block, and that's block 14. The record keeps the printed key and the hash of the lower case string, and the chain agrees with both.
Was coy fair for "intentionally keeping secret"? u/silver_anth said no, it's not the first definition Google gives. u/Quantris said looking up the first Google hit would be lame anyway. Both have a point.
Moving out
This is the last block posted on r/bitcoinpuzzles. Block 13 went up on r/Grycoin, and one player found out the hard way. "So I subscribed to the wrong community."