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