This Sudoku is (as always) easy with backtracking, but it seems harder than most of the ones that are hard enough for my program to need backtracking:

2 = = = = 9 = 1 =
= = = = = 3 = = =
= 3 5 = = = 2 = =

= = 4 = = = = = =
= 8 = 6 = = 3 9 =
= = = 8 2 = 7 = 4

= = 8 7 = = 4 = =
= 9 = = = 6 = 3 =
= = 1 = = = = = =

(Sorry for the weird character choice but it was the only one I could find that came out looking close to monospaced and wasn't misinterpreted by G+ as formatting.)
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