IDcollectionsQuizchain2

quizchain2/1

Solved on 2019-05-13 after 2d 23h 4m, 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.

A famous naMe, upside down

May 11, 2019. The first run ended at block 77, and its last block had another mistake in it. House rule: a failed block makes the next one 77 mBTC. So the second run opens big.

The question is four words long. "A rather famous naMe." Someone asked right away whether the capital M was on purpose. "It is." The format is [solution] TOMI [TOMI] [link], and the link is the whole block 76 key of the first run. The post adds the first digits of three MD5 hashes: 33c for the full string, 4 for the answer, e for the TOMI field.

Players threw everything at it. Pokémon, Canadian MPs, Dorian Nakamoto, the royal family. Nothing.

Three hints and a band

On day two the author wrote: "Uses method of a recent previous block." Which one? "One in the ten between 67 and 76." Then, late on May 13, the second hint just said "block 69".

Block 69 of the first run was "Upside down". Its answer was WM. Read the M in naMe upside down and you get W. Say W out loud. Double U. Two U's. U2.

The claim confirmed at 23:25:35 UTC, 24 minutes after the hint. Ten minutes later u/Randomiser posted the string: U2 TOMI upside down and the block 76 key. They'd been trying names that start with W. Hard to blame them. A band was not on anybody's list.

The author had one more fun fact. U2 shrinks to a single letter, W, and W has an upside down partner, M. Cute.

IDquizchain2/101 / 102019-05-11 → 2019-05-13
Puzzle / quizchain2

1

bitcoinp2pkh solved

Record 

bitcoinPuzzle({
  address: p2pkh("15BbSHKqRsaH…dXyySvMS", "2de1688bdbb6…cdcbec03"),
  status: Status.Solved,
  key: wif("L39LYDM5ehxx…RtHVHZAt").entropy("33c6780dcbd5…278a0e4e", source("https://www.…block_1/")).derived(),
})
Prize
0.077 BTC
Key material
wif, derived from the recipe
Verification
verified
Solved
2019-05-13 · 2d 23h 4m
tx 2
Trail
Explorerblockstream.info
Sourcereddit.com/r/bitcoinpuzzles/comments/bn5ucg/77_mbtc_quizchain2_block_1
Tryquizchain2/1 in the playground
Address
15BbSHKqRsaH9oGk8zfTD5NZfRdXyySvMS

hash160 2de1688bdbb6846a5f15f87fa71031d6cdcbec03

Balance
asking the explorer

Key

public key · compressed
03bb9076fd7548a8bb6e28887eddbecba9c70fca75ebe4a926bbee1ca3384a0834
WIF
L39LYDM5ehxxN9H6MLwQ2duJbsVucNuoHwZJAaYfLhL9RtHVHZAt
entropy hash
33c6780dcbd5927d8510d924278a0e4e

Transactions

  1. funding2019-05-110.077 BTCd79b97700a…6eb90b
  2. claim2019-05-130.07669453 BTCc7dc06980a…4af8ca

Hints

  1. undated

    officialQuestion: A rather famous naMe.

    Sourcereddit.com/r/bitcoinpuzzles/comments/bn5ucg/77_mbtc_quizchain2_block_1

    Published answer

    As the winner has explained in comments, solution was U2 (a rather famous band name). And it was derived from the hint by reading M upside down and then W as UU, which is one step away from the solution. TOMI field was just "upside down".

    Sourcereddit.com/r/bitcoinpuzzles/comments/bn5ucg/77_mbtc_quizchain2_block_1

  2. undated

    officialFormat: [solution] TOMI [TOMI] [link]

    Sourcereddit.com/r/bitcoinpuzzles/comments/bn5ucg/77_mbtc_quizchain2_block_1

    Published answer

    U2 TOMI upside down L2e6gPSXnq7KJBfkoD7cHGVZuhRUDARJz2Cc9JcSNLsKRZhH552F

    Sourcereddit.com/r/bitcoinpuzzles/comments/bn5ucg/comment/endzxka

  3. undated

    officialUse L2e6gPSXnq7KJBfkoD7cHGVZuhRUDARJz2Cc9JcSNLsKRZhH552F (private key of block 76) as a link for this block.

    Sourcereddit.com/r/bitcoinpuzzles/comments/bn5ucg/77_mbtc_quizchain2_block_1

  4. undated

    officialFIrst three digits of MD5 hash are 33c.

    Sourcereddit.com/r/bitcoinpuzzles/comments/bn5ucg/77_mbtc_quizchain2_block_1

  5. undated

    officialFirst digit of MD5 hash of solution only is 4.

    Sourcereddit.com/r/bitcoinpuzzles/comments/bn5ucg/77_mbtc_quizchain2_block_1

  6. undated

    officialFirst digit of MD5 hash of TOMI field only is e.

    Sourcereddit.com/r/bitcoinpuzzles/comments/bn5ucg/77_mbtc_quizchain2_block_1

  7. undated

    officialHint: Uses method of a recent previous block.

    Sourcereddit.com/r/bitcoinpuzzles/comments/bn5ucg/comment/en7okiq

  8. undated

    officialOne in the ten between 67 and 76.

    Sourcereddit.com/r/bitcoinpuzzles/comments/bn5ucg/comment/ena1bdm

  9. undated

    officialHint number 2: block 69

    Sourcereddit.com/r/bitcoinpuzzles/comments/bn5ucg/comment/endvvgh

ID@agntn/puzzlesv0.26.0MIT license

Public data about public puzzles. Balances come from the chains' explorers through the worker, cached for five minutes. Every key here was public before it landed in a record.