&gt; Do it, scrub.\n\n    +-----+-----+-----+  \n    |2 4 7|8 3 1|6 9 5|  \n    |9 8 3|7 5 6|2 4 1|  \n    |1 5 6|4 2 9|3 8 7|  \n    +-----+-----+-----+  \n    |3 1 8|9 6 2|7 5 4|  \n    |4 7 5|3 1 8|9 6 2|  \n    |6 2 9|5 4 7|1 3 8|  \n    +-----+-----+-----+  \n    |5 6 2|1 8 3|4 7 9|  \n    |8 9 1|6 7 4|5 2 3|  \n    |7 3 4|2 9 5|8 1 6|  \n    +-----+-----+-----+  \n\n:3\n\nEdit: 20 minutes, but in my defense I'm pretty rusty, haven't done one for a couple years now