quizchain2/13

Solved on 2019-05-22 after 1d 5h 55m, 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.

Pizza day

May 22, 2019. Bitcoin Pizza Day, and the first block on the author's new subreddit, r/Grycoin. The plan was simple. Make a block easy enough for humans and bots alike, and see who's faster.

The question is one word: Kraaz. The format is [Solution] TOMI [TOMI], and the TOMI field is "the relevant name for the solution". Digits b5e, c and f.

Atbash flips the alphabet. K becomes P, r becomes i, a becomes z. Kraaz is Pizza. And the relevant name? The man who paid 10,000 BTC for two pizzas, Laszlo Hanyecz.

Nine minutes

The post went up at 12:57:25 UTC. The claim confirmed at 13:06:33. "Even few minutes have not passed," one comment says.

u/mooncritic posted the string Pizza TOMI Laszlo Hanyecz and admitted the rush cost "a big fee". The chain backs that up. 7 mBTC went in, 6.36 went out, so almost 0.64 mBTC went to the miner. A fitting tip for pizza day.

The author took it as proof that humans beat scripts on easy blocks. Setting up a script takes time, hashing a pizza doesn't. The hardest part, by the author's own account, was spelling Hanyecz right.

IDquizchain2/1313 / 202019-05-21 → 2019-05-22

Puzzle / quizchain2

13

bitcoinp2pkh solved

Record

bitcoinPuzzle({
  address: p2pkh("1KZ2riUcEkAe…EZohZWkW", "cb81200a9aac…d5f2174c"),
  status: Status.Solved,
  key: wif("L2AH6wtNHQjd…zxLuYJTU").entropy("b5e4cbfe80a8…2ed00c91", source("https://www.…lock_13/")).derived(),
})

Prize: 0.007 BTC
Key material: wif, derived from the recipe
Verification: verified
Solved: 2019-05-22 · 1d 5h 55m

tx 2

Trail: Explorerblockstream.info; Sourcereddit.com/r/Grycoin/comments/brogvu/7_mbtc_quizchain2_block_13; Tryquizchain2/13 in the playground

Address: 1KZ2riUcEkAebmPrGYhSJwC4f9EZohZWkW

hash160 cb81200a9aace112a6108585c435be9fd5f2174c

Balance

asking the explorer

Key

public key · compressed: 0344193ee4b704045e85c197bab2862e12db7fe792a7a9f2dcf594de7df4325b78
WIF: L2AH6wtNHQjdRftfuHd5VKXiGh3RB4HNm2tiBF8i9MKKzxLuYJTU
entropy hash: b5e4cbfe80a8b7a927101b882ed00c91
entropy source: MD5 of the word, TOMI and a name

Transactions

funding2019-05-210.007 BTC7984db3918…a708e5
claim2019-05-220.0063616 BTCeea395e5b3…d75f73

Hints

undated
officialQuestion: Kraaz
Sourcereddit.com/r/Grycoin/comments/brogvu/7_mbtc_quizchain2_block_13
Published answer
Method was using Atbash on the solution Pizza (for Bitcoin Pizza day today). The most difficult part was getting the spelling of the name Laszlo Hanyecz right, which went into the TOMI field.
Sourcereddit.com/r/Grycoin/comments/brogvu/7_mbtc_quizchain2_block_13
undated
officialFormat: [Solution] TOMI [TOMI]
Sourcereddit.com/r/Grycoin/comments/brogvu/7_mbtc_quizchain2_block_13
Published answer
Solution as mentioned in other comments is "Pizza TOMI Laszlo Hanyecz".
Sourcereddit.com/r/Grycoin/comments/brogvu/comment/eofcjjh
undated
officialTomi field is the relevant name for the solution.
Sourcereddit.com/r/Grycoin/comments/brogvu/7_mbtc_quizchain2_block_13
undated
officialFirst three digits of MD5 hash are b5e.
Sourcereddit.com/r/Grycoin/comments/brogvu/7_mbtc_quizchain2_block_13
undated
officialFirst digit of solution only is c.
Sourcereddit.com/r/Grycoin/comments/brogvu/7_mbtc_quizchain2_block_13
undated
officialFirst digit of TOMI field only is f.
Sourcereddit.com/r/Grycoin/comments/brogvu/7_mbtc_quizchain2_block_13