grycoin/2

Claimed on 2019-08-03 after 2d 8h 57m, without a published key. 0.007 BTC on Bitcoin.

Story

What the post asked, what the answer turned out to be, and what the chain says happened. The record below holds the data.

Funded early on purpose

August 1, 2019. The author funds block 2 two days before the post. "I am pretty sure this one will not be solved by a robot before posting the block." A couple of minutes before posting, the coins are still there. Point made.

The question is the text

No riddle this time. The question explains the block 77 format on a tiny example. Keep the whole text, change the case of a few letters, the ones that mark Satoshi's "signs". Flip I to i and himself to himselF, for example. Do that for every paragraph where you see a sign. Hash from the first I to the period after method, with \r\n line breaks. The MD5 starts with 3c6.

u/puzzleponky wasn't on Windows, so the copied text came out with plain \n breaks. They asked for the hash of the unchanged text. The author obliged: 7759227, "with three numbers 7 turning up there".

Nobody knows, including the author

The claim confirmed at 14:02:10 UTC, about ten hours after the post. u/JDScreesh congratulated puzzleponky. So what was the solution?

The author's reply is a gem. "One, I actually don't know." Which letters to flip is obvious if you know the Bitcointalk puzzle. How to get from there to the prize isn't, "not even to me". The second reason: the trick helps with the real big block, and the winner earned that edge.

u/bestcoderneeded didn't buy it and said the author must be the solver. Nobody settled it. The next day the account posted Shutting Down, and the Grycoin chain stopped right there.

IDgrycoin/202 / 22019-08-01 → 2019-08-03

Puzzle / grycoin

2

bitcoinp2pkh claimed

Record

puzzle({
  chain: "bitcoin",
  address: "1tzieUfbeQgh…CRgX6eLi",
  status: Status.Claimed,
})

Prize: 0.007 BTC
Key material: none published
Verification: unverifiable
Solved: 2019-08-03 · 2d 8h 57m

tx 2

Trail: Explorerblockstream.info; Sourcereddit.com/r/Grycoin/comments/cleczc/grycoin_block_2; Trygrycoin/2 in the playground

Address: 1tzieUfbeQghz2zjDeGHcAEfzCRgX6eLi

hash160 09d565074752019721ce68c58548ebc13750d5cc

Balance

asking the explorer

Key

public key · compressed: 039ad91b631e5e2f0915b682c6ab8a29d81bb464a2ffc8ebf9702aad7b238192dc

Transactions

funding2019-08-010.007 BTCf11eca9925…1a2e3c
claim2019-08-030.00689594 BTC351371588a…4e4cc7

Files

Hints

undated
officialAs is already clear from the reference to block 29, people are supposed to keep the whole long text and change only a couple of letters in their capitalization.
Sourcereddit.com/r/Grycoin/comments/cleczc/grycoin_block_2
undated
officialWhen you do that, you would end up changing "I" to "i" and "himself" to "himselF".
Sourcereddit.com/r/Grycoin/comments/cleczc/grycoin_block_2
undated
officialWhich would be the solution, once you do that for all the paragraphs where you recognize the signs. And keep the rest completely unchanged.
Sourcereddit.com/r/Grycoin/comments/cleczc/grycoin_block_2
undated
officialFormat: [solution]
Sourcereddit.com/r/Grycoin/comments/cleczc/grycoin_block_2
undated
officialStart with the first "I" and stop with the period after "method", with no spaces or line breaks before or after that included in the hash.
Sourcereddit.com/r/Grycoin/comments/cleczc/grycoin_block_2
undated
officialAnd for the record, each of these resolves to the combination of the ASCII codes 13 and 10, for 13 10 13 10 meaning two line breaks, or \r\n \r\n as another way of saying the same thing.
Sourcereddit.com/r/Grycoin/comments/cleczc/grycoin_block_2
undated
officialFirst three digits of MD5 hash are 3c6.
Sourcereddit.com/r/Grycoin/comments/cleczc/grycoin_block_2
undated
officialI am saying copy paste and do not change anything with the line breaks, change only the capitalization of letters in solution.
Sourcereddit.com/r/Grycoin/comments/cleczc/comment/evuthpw
undated
officialThank you for asking. I really like the answer, turns out that the first seven digits of that MD5 hash are 7759227, with three numbers 7 turning up there.
Sourcereddit.com/r/Grycoin/comments/cleczc/comment/evv9k37
undated
officialOne, I actually don't know. The question of what letters to change in capitalization is obvious if you know the solution to Satoshi's bitcointalk puzzle, which I revealed already. The question of how to go from that to claiming the prize is not, not even to me.
Sourcereddit.com/r/Grycoin/comments/cleczc/comment/evwv4rm