This puzzle can have R3C3 removed to make it a little harder.
I know this because I added the 9 to make the puzzle easier.
When I run "optimize" nothing happens. I have the current version and uniqueness is off.
Might I have something set wrong?
Code: Select all
. 1 2 | 3 . . | . 7 .
4 3 . | . . 9 | 8 . .
6 . 9 | . 8 . | . . .
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2 . . | 4 . . | . 5 .
. . 6 | . . . | 9 . .
. 5 . | . . . | . 6 .
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. 2 . | . 3 . | 4 . .
7 . . | 9 . 1 | . . 3
. . . | . . . | . 2 7
