quizchain2/14

Solved on 2019-05-25 after 3d 8h 45m, key derived from the published recipe. 0.077 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.

The penalty block

May 23, 2019. Block 12 had a wrong capitalization hint, so block 14 pays 77 mBTC. The author calls it "a new way to screw up that has not happened before". Honest.

The question: 14 from 7. Just that. The format is [solution], no TOMI field. The post says the answer isn't something as simple as "2". And the first three digits of the "MP5" hash are 5f8. MP5. Half an hour later an update said MD5.

Players went everywhere. Bit shifts, 7<<1. The 21 chapters of the Wattpad story. The genesis address, tried "in every which way".

Red seven

Hint 1 said the answer was already in the Wattpad story when the block went up. Hint 2, on May 25, was meant to be decisive. Two words: "Red seven."

The thread never explains those two words. What it does give is the answer. The genesis address is 1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa. Skip the leading 1. Why? It's the prefix, not part of the address, the author said, and it makes the answer "slightly less obvious". Take the first seven characters and the last seven. A1zP1eP7DivfNa. Fourteen from seven, twice.

The claim confirmed at 08:40:22 UTC on May 25. u/puzzleponky posted the answer three minutes later. They'd tried 1A1zP1e7DivfNa the day before, with the 1. So close.

Totally not me

Before the solve, a comment accused u/mooncritic of being the author's second account. Then it got deleted, along with a whole chain of replies. The winner closed with "And I am certainly not AoiNakamoto". The author's update congratulates "the winner, who is totally not me", and then once more, "who is definitely not me".

The chain adds one fun detail. This claim and the block 16 claim pay the same address, and u/puzzleponky says they solved both, block 16 an hour earlier. That's where the idea for this one came from.

IDquizchain2/1414 / 202019-05-21 → 2019-05-25

Puzzle / quizchain2

14

bitcoinp2pkh solved

Record

bitcoinPuzzle({
  address: p2pkh("1JkKLAKSQ6Bm…f91aeojd", "c2ab537ac168…bb508a95"),
  status: Status.Solved,
  key: wif("L4QU6j4wVq6p…FVoV5WG8").entropy("5f844f86af92…2974b696", source("https://www.…lock_14/")).derived(),
})

Prize: 0.077 BTC
Key material: wif, derived from the recipe
Verification: verified
Solved: 2019-05-25 · 3d 8h 45m

tx 2

Trail: Explorerblockstream.info; Sourcereddit.com/r/Grycoin/comments/bs06rg/77_mbtc_quizchain2_block_14; Tryquizchain2/14 in the playground

Address: 1JkKLAKSQ6BmC26DZbTgcpqBNUf91aeojd

hash160 c2ab537ac168ebf8736e74597956a7cebb508a95

Balance

asking the explorer

Key

public key · compressed: 02a4780dd6045c8e96211360c19fb5d95810480638fbee20975b972a915dd0b54d
WIF: L4QU6j4wVq6pgpnYiUboCCETaGGJVdjp1JYRJtDAqg42FVoV5WG8
entropy hash: 5f844f86af9217915e3764d92974b696
entropy source: MD5 of the fourteen characters

Transactions

funding2019-05-210.077 BTC377e514898…0f1e01
claim2019-05-250.07656992 BTC25ca033024…a8c603

Hints

undated
officialQuestion: 14 from 7.
Sourcereddit.com/r/Grycoin/comments/bs06rg/77_mbtc_quizchain2_block_14
Published answer
As indicated by the winner, who is totally not me, solution was the first and the last seven digits of the genesis block address, not counting the prefix 1. A1zP1eP7DivfNa.
Sourcereddit.com/r/Grycoin/comments/bs06rg/77_mbtc_quizchain2_block_14
undated
officialFormat: [solution]
Sourcereddit.com/r/Grycoin/comments/bs06rg/77_mbtc_quizchain2_block_14
Published answer
Solution was A1zP1eP7DivfNa.
Sourcereddit.com/r/Grycoin/comments/bs06rg/comment/eoprx9p
undated
officialHint: The solution is not something as simple as "2", which is already apparent from the lack of TOMI field.
Sourcereddit.com/r/Grycoin/comments/bs06rg/77_mbtc_quizchain2_block_14
undated
officialFirst three digits of MP5 hash are 5f8.
Sourcereddit.com/r/Grycoin/comments/bs06rg/77_mbtc_quizchain2_block_14
undated
officialUpdate: Correct is "MD5" hash.
Sourcereddit.com/r/Grycoin/comments/bs06rg/77_mbtc_quizchain2_block_14
undated
officialHint for this was already available at the time of posting at the Wattpad story.
Sourcereddit.com/r/Grycoin/comments/bs06rg/77_mbtc_quizchain2_block_14
undated
officialRed seven.
Sourcereddit.com/r/Grycoin/comments/bs06rg/77_mbtc_quizchain2_block_14