quizchain2/33

Solved on 2019-06-11 after 2d 1h 3m, key derived from the published recipe. 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.

Can you find the answer?

June 9, 2019. The question is the whole puzzle: Can you find the answer? A TOMI field too. Digits b60, f and 7. The post even went up thirteen minutes before its funding transaction got a block.

Players called it impossible. u/silver_anth called it a guessing game. The author called it "very easy if you find the method". Both were right, in a way.

Four hints, then 0078

The hints came slow, then fast. The TOMI field has four items and starts with three capital letters. The method came from a player's comment under block 27. The last item is list. And the solution is a four digit number.

So: where do you find the word answer as a number? In the BIP39 word list. It's on line 78. Hence 0078, the format of the site the author used. The TOMI field is BIP 39 word list.

The claim confirmed at 05:23:23 UTC on June 11, two days after funding, and u/Randomiser says it was theirs. And the zeros? u/puzzleponky noted the list counts from zero, which makes answer word 77. Would have been a nice number for this series.

IDquizchain2/3333 / 772019-06-09 → 2019-06-11

Puzzle / quizchain2

33

bitcoinp2pkh solved

Record

puzzle({
  chain: "bitcoin",
  address: "1JcvYSVA8Azy…agsQEk26",
  status: Status.Solved,
  key: wif("KyRE11sbA7Sy…YPPfSPTQ").entropy("b60c14d39a79…058474db", source("https://www.…lock_33/")).derived(),
})

Prize: 0.007 BTC
Key material: wif, derived from the recipe
Verification: verified
Solved: 2019-06-11 · 2d 1h 3m

tx 2

Trail: Explorerblockstream.info; Sourcereddit.com/r/Grycoin/comments/bygeur/7_mbtc_quizchain2_block_33; Tryquizchain2/33 in the playground

Address: 1JcvYSVA8AzyYRT7Y6u1iepdKTagsQEk26

hash160 c1456442f4482b5d877eadf2e9ab7611b6666488

Balance

asking the explorer

Key

public key · compressed: 028b9359244ef4511c1a271cf15192b321a3fb6f9deb24245834402edc7d7798fd
WIF: KyRE11sbA7SyDEuxWHwbhoNHYxmLY1DXsxiK177QNb3pYPPfSPTQ
entropy hash: b60c14d39a7984882f495cb7058474db
entropy source: MD5 of the number, TOMI and four items

Transactions

funding2019-06-090.007 BTCc97d65c858…47ac24
claim2019-06-110.00681472 BTC8f6b9c3c1e…41035e

Files

Techniques

md5-to-bip39-entropypuzzlereddit.com/r/Grycoin/comments/bygeur/7_mbtc_quizchain2_block_33

Hints

undated
officialQuestion: Can you find the answer?
Sourcereddit.com/r/Grycoin/comments/bygeur/7_mbtc_quizchain2_block_33
Published answer
Solution was 0078 which is the four digit number for the word "answer" in the "BIP 39 word list", which in turn was the TOMI field.
Sourcereddit.com/r/Grycoin/comments/bygeur/7_mbtc_quizchain2_block_33
undated
officialFormat: [solution] TOMI [TOMI]
Sourcereddit.com/r/Grycoin/comments/bygeur/7_mbtc_quizchain2_block_33
Published answer
The answer was 0078 TOMI BIP 39 word list - "answer" being the 78th word in the BIP-39 wordlist.
Sourcereddit.com/r/Grycoin/comments/bygeur/comment/eqqswj7
undated
officialFIrst three digits of MD5 hash are b60.
Sourcereddit.com/r/Grycoin/comments/bygeur/7_mbtc_quizchain2_block_33
undated
officialFIrst digit of solution only MD5 hash is f.
Sourcereddit.com/r/Grycoin/comments/bygeur/7_mbtc_quizchain2_block_33
undated
officialFIrst digit of TOMI field only MD5 hash is 7.
Sourcereddit.com/r/Grycoin/comments/bygeur/7_mbtc_quizchain2_block_33
undated
officialFirst item of TOMI field is three capital letters, format XXX. There are four items in the TOMI field.
Sourcereddit.com/r/Grycoin/comments/bygeur/7_mbtc_quizchain2_block_33
undated
officialHint 2: I did not come up with the method for this block by myself, but found it in a comment by one of the players.
Sourcereddit.com/r/Grycoin/comments/bygeur/7_mbtc_quizchain2_block_33
undated
officialLast item of the TOMI field is the word "list".
Sourcereddit.com/r/Grycoin/comments/bygeur/7_mbtc_quizchain2_block_33
undated
officialFormat for solution is four digit number, like "0007".
Sourcereddit.com/r/Grycoin/comments/bygeur/7_mbtc_quizchain2_block_33