The first 8 problems (in the Geek Challenge category), I solved pretty easily, but I got stuck on number 9, and eventually gave up.

I have some free time over the next week or so, so I thought I'd give it another go.

Honestly, I still don't know exactly how to approach it, but hopefully I'll come up with something.

So, if anyone wants to join me, here's the challenge:

Level 9 : The Hex Box wrote:

- Code: Select all
`DEF`

|123|

|234|

|345|

---+---+---

A 123|456|789

B 234|567|891

C 345|678|912

---+---+---

|789|

|891|

|912|

Here is something I call a Hex Box. It is a device where you can move any row

or column as long as there are nine numbers in that row or column. You can

therefore only move three rows and three columns (rows ABC and columns DEF).

You are only allowed to shift a row right and a column down. When a row or

column is shifted, the last number gets placed back in the first.

The reason why this is called a Hex Box is for the way each shift is denoted.

Any move is denoted by it's row or column, then the number of shifts.

For example, a move "A5" means row A gets shifted to the right 5 times.

A move of A5 would look like this (assuming you started with the above.)

- Code: Select all
`DEF`

|123|

|234|

|345|

---+---+---

A 567|891|234

B 234|567|891

C 345|678|912

---+---+---

|789|

|891|

|912|

Move F3 would then look like this:

- Code: Select all
`DEF`

|129|

|231|

|342|

---+---+---

A 567|893|234

B 234|564|891

C 345|675|912

---+---+---

|781|

|897|

|918|

So the move order at this point would be A5F3.

With that information try to figure out the move order for this Hex Box,

starting from the setup at the top of the page:

- Code: Select all
`DEF`

|212|

|423|

|534|

---+---+---

A 649|125|277

B 917|546|888

C 123|863|999

---+---+---

|983|

|134|

|751|

The solution will be the 24-hex digit move order and as there are multiple

answers use the solution that has an MD5 checksum of

113DAC12B9A54D39944668499F72083D.

Hint: Every row and column gets moved twice (not the number of shifts) and a

row or column isn't moved again until the other five have been moved first

(ie. F4B2A3C7D5E8E2A5C7F1D5B7).

P.S. I would recommend you try the other challenges as well, IIRC they were pretty good. But I might be wrong, it's been a while...