Using almost the same solvers as you, but not exactly the same ones, I had a shot at this.
I added all Naked/Hidden Subset solvers without any restrictions (0-99), Intersection and Empty Rectangle without any restrictions (0-99) and minimum one X-Wing (1-99).
During lunch (< 40 min.) I got a puzzle requiring 1 X-Wing + 1 Skyscraper.
I assume that unless you explicitly set a technique/solver = 0, it might be used.
There are two ways to do this:
- Disable the solvers for the techniques you do not want in a puzzle (Solver tab to the right of the Log tab)
- In Options > Preferences... > Generator > Difficulty > Solvers list set all techniques you do not want in a generated puzzle = 0.
To speed up testing I did both.
To speed up puzzle generation I also minimized all other restrictions:
Number of guesses = 0-50 = FULL RANGE
Singles bottleneck = 0 = FULL RANGE
Symmetries = ALL
Number of givens = FULL RANGE
Overlapping grids = CAN HAVE GIVENS
You can find the .xml file (nj3h.xml) with these settings here:
http://cid-c136798e52d0119c.skydrive.live.com/self.aspx/SudokuSolver/nj3h/nj3h.xmlImport it into:
1) Solvers > Import Solvers' List... (right click in the Solvers Tab Window)
2) Options > Preferences... > Generator > Difficulty (Select Difficulty [gets a blue background] and click on the Folder icon now visible)
Using these settings I went out for some outdoor activities. When checking two hours later I had the following Samurai puzzle.
It requires an X-Wing and an Empty Rectangle, but the X-Wing is a red herring:
100009020000107006800000400000010007038000000000800209084050000000300000026000000
090200006800105000004000007600090000000000860702003000000010790000007000000000520
000000000000070000000902000010000090000801000096000810000000000000308000000106000
030080000010020000050010000000400032001008000000600074009873000007000203103000700
000020060000030080000090010350007000000400500870009000000873600703000400006000803
To speed things up, I suggest you start with few requirements and increase them as you get experience.
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