[puzzlebox]

Originally Posted by Ben Again

EDIT: Never mind. I figured it out.

Sweet! Wish my friends were that cool.

Since I typed this anyway, will post it for anyone who cares:

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Each pair of letters in the coded message represents 2 different letters found in the grid. There's a reason we work with 2 letters at a time - we need to look at the "rectangles" created by each pair of letters in the grid.

Let's start with the third pair, KL, as an example (the first two pairs are a bit special, we'll come back to them).

When we look at the letters K and L in the grid, they form 2 corners of a rectangle:

cipher1.JPG

The decoded letters are the ones in the OTHER corners of that rectangle - in this case, K=D and L=T.

Now we've decoded that pair, let's note it down.

Coded:   PG EW KL AB KN SE ZC PC DQ MK VH CN
Decoded: ?? ?? DT ?? ?? ?? ?? ?? ?? ?? ?? ??

Next, we can look at the fourth pair, AB:

cipher2.JPG

In this rectangle, the decoded letters are H and E (A=H, B=E).

So now we know that pair too:

Coded:   PG EW KL AB KN SE ZC PC DQ MK VH CN
Decoded: ?? ?? DT HE ?? ?? ?? ?? ?? ?? ?? ??

And keep going like that until you have your decoded message!

Back to the first 2 pairs... they are a little different because the coded letters appear in the same column, and don't make a rectangle in the grid. For these ones we "slide up" one space in the grid to get the decoded letters. Don't worry too much about those ones if it's confusing at the moment - I'm sure you'll be able to work out the message without doing them.