Programming Puzzle

[Jatinder]

Hi all,
I m puzzled with a problem where I have to fill a 9x9 matrix in such a
way that one digit from 1 to 9 can be used only once per row/column.
It can be repeated along diagonal. I had tried some algo but in vain.
Please help me by providing the algo or souce code.

 

[osmium]

I m puzzled with a problem where I have to fill a 9x9 matrix in such a
way that one digit from 1 to 9 can be used only once per row/column.
It can be repeated along diagonal. I had tried some algo but in vain.
Please help me by providing the algo or souce code.

How about this: 123456789, 912345678, 891234567, ....

Algorithmic questions such as this properly belong in comp.programming.