You have to get 1-9 in every row, column, and 3x3 box without having the same number twice in a row column or box.
( sprinkles ITS AN ISLAND, morron, Sat 9 Jul 2005, 14:43, archived)

Sounds like a boring waste of time to me.

( hoifbjifbef, Sat 9 Jul 2005, 14:45, archived)

This.

( Amorous Badger NAKED BEA ARTHUR PHOTOS 4U, Sat 9 Jul 2005, 14:46, archived)