diff -r 5bab2e971333 -r 2c0a2766461c test-sudoku
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test-sudoku	Thu Jan 31 18:44:44 2013 +0100
@@ -0,0 +1,9 @@
+_ 1 _ 9 _ _ 8 _ _
+_ _ _ _ _ 8 _ _ 4
+6 _ 5 _ _ _ 7 _ _
+_ 9 _ _ 6 _ _ _ 8
+_ _ _ 2 _ 7 _ _ _
+8 _ _ _ 3 _ _ 6 _
+_ _ 2 _ _ _ 5 _ 3
+1 _ _ 4 _ _ _ _ _
+_ _ 6 _ _ 2 _ 1 _