Instead of looking at your code, I just visited one of the links that describe the problem, and have this approach to offer (to be coded as you choose).

The brute force method works (put a queen at (1,1) or top left, and place the next queens in the next column, and so forth) but it's a little inefficient. My approach would start off by placing a queen at (1,1), but the placement of the next queen would be in the next available location that is out of reach of all of the queens placed on the board so far. More queens would be placed in this manner until the number of uncovered places reached zero (solution!) or until we run out of queens.

--t. alex
but my friends call me T.

p.s. And I'm not sure why your second matrix shows 

Q 0 0 rather than Q 0 0
1 0 1             0 0 1
1 1 0             0 1 0

[download]
Wouldn't the matrices be symmetric about the diagonal?

In reply to Re: Trying to solve N-Queens by talexb
in thread Trying to solve N-Queens by jeffa

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