Puzzle #6 Solution

# Puzzle #6 Solution

By shuttlecock | Shuttlecock Puzzles | 20 Oct 2021

Puzzle #6 has been solved! Here are the solutions.

### Context

The puzzle comprises a Banano logo surrounded by 24 sets of lines of different lengths. These sets of lines are hexagrams from the I-Ching. Paying close attention to the hexagrams reveals that they are the the hexagrams for the numbers 1 to 24. This corresponds neatly with the 24-word mnemonic or seed phrase that is needed for a Banano wallet. This strongly suggests that the information that you can find on each hexagram corresponds to the position of the word within the 24-word seed phrase (e.g. hexagram 19 would be position #19).

### Puzzle 1. 200 BAN

This is the easiest puzzle. Focus on the outer most ring of the image:

Here, we see that the circled text reads: 68 75 72 72 79. This information is in hexadecimal. One clue that the information is in hexadecimal format, is that the numbers go from 0-9 and the letters from A-F. Another clue (more loosely connected) is that we are looking at hexagrams.

When we convert the information from hexadecimal to text (more specifically, to ASCII), we see that 68 75 72 72 79 is hurry. The hexagram that this information is on, represents the number 14. So this word is #14 in the 24-word seed phrase.

We proceed to do the same for the other words, and we get the following:

1 maze
2 board
3 doctor
4 clean
5 team
6 display
7 baby
8 party
9 kidney
10 unusual
11 silk
12 machine
13 own
14 hurry
15 tray
16 market
17 sibling
18 purse
19 monitor
20 car
21 dizzy
22 blind
23 sand
24 cool

And the puzzle is solved.

### Puzzle 2. 300 BAN

This puzzle is a little more difficult. This time, we focus on the inner ring of text:

Here, we see that the circled text reads 20 31 30 38 37. The information is, again, in hexadecimal. But when we convert 20 31 30 38 37 from hexadecimal to text, we get 1087. This is because 20 in hexadecimal is a space (in ASCII). What can we do with this information?

The answer is to refer to the BIP-39 word list. The BIP-39 list is a list of 2048 words. All the words in seed phrases are taken from this list. An interesting feature of the BIP-39 list is that the first 4 letters are unique to each word within the list. That is, there are no two words in this list that have the same first 4 letters. This means that if you have the first four letters of the word, you effectively know the word (by referring to the BIP-39 list).

Returning to the topic, we simply need to find the 1087th word on the BIP-39 list, which is march. The hexagram that this information is on, represents 9. So this word is #14 in the 24-word seed phrase.

We proceed to do the same for the other words, and we get the following:

1 slush
2 train
3 grocery
4 foster
5 episode
6 zero
7 child
8 keen
9 march
10 beach
11 science
12 kick
13 snap
14 peasant
15 mountain
16 require
17 welcome
18 abuse
19 manual
20 bike
21 warfare
22 capable
23 coral
24 swallow

And the puzzle is solved.

### Puzzle 3. 500 BAN

This puzzle is not necessarily the most difficult. However it involves a little creative thinking.

Recall that the title of the puzzle is Yin-Yang. In the context of the hexagrams, an unbroken line is "Yang", and a broken line are "Yin". The solution to this puzzle requires you to do some simple calculation: take the number of Yin, and deduct the number of Yang. There are 78 Yin and 66 Yang on the image, and 78 - 66 = 12.

The number 12 is, however, neither a 24-word seed phrase, or a 64-character seed or private key. The solution is to put 12 through the SHA256 hash function. There are various websites where you can do so, one of which is here. A similar step was required to access Wallet #3 in Puzzle #3

Once you do so, you get a 64-character seed: 6b51d431df5d7f141cbececcf79edf3dd861c3b4069f0b11661a3eefacbba918, and the puzzle is solved.

An interesting clue: the I-Ching was created in the Zhou dynasty, which ended in 256 BC.

shuttlecock