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October 18 diabolical feom Sudoku.org.UK

 
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA

PostPosted: Tue Oct 20, 2015 4:25 pm    Post subject: October 18 diabolical feom Sudoku.org.UK Reply with quote

I enjoyed this one, using four steps but not convinced that all were necessary.

Code:

+-------+-------+-------+
| . 5 2 | . . . | 9 . . |
| . 9 . | 2 . 5 | . 3 8 |
| . . . | . . 1 | . . . |
+-------+-------+-------+
| . . 8 | 9 . 3 | . . . |
| . . 6 | . . . | 7 . . |
| . . . | 1 . 2 | 5 . . |
+-------+-------+-------+
| . . . | 8 . . | . . . |
| 1 2 . | . . 9 | . 5 . |
| . 8 9 | . . . | 3 1 . |
+-------+-------+-------+

Play this puzzle online at the Daily Sudoku site
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JC Van Hay



Joined: 13 Jun 2010
Posts: 494
Location: Charleroi, Belgium

PostPosted: Tue Oct 20, 2015 5:03 pm    Post subject: Reply with quote

Code:
+-------------------+--------------+------------------+
| 36(4)  5     2    | 367  8   67  | 9     7-4  1     |
| 7      9     1    | 2    4   5   | 6     3    8     |
| 8      346   34   | 367  9   1   | 2(4)  247  5     |
+-------------------+--------------+------------------+
| 5      47    8    | 9    67  3   | 1     46   2     |
| 2      1     6    | 4    5   8   | 7     9    3     |
| 9      347   347  | 1    67  2   | 5     8    46    |
+-------------------+--------------+------------------+
| 36(4)  3467  5    | 8    1   467 | 2(4)  246  9     |
| 1      2     7(4) | 67   3   9   | 8     5    67(4) |
| 6(4)   8     9    | 5    2   467 | 3     1    467   |
+-------------------+--------------+------------------+
(4)[r1c1=r79c1-r8c3=r8c9-r7c7=r3c7]-4r1c8; stte
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