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Daily Sudoku for 21/7/2017-Diabolical

 
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Clement



Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania
PostPosted: Sat Jul 22, 2017 8:14 am    Post subject: Daily Sudoku for 21/7/2017-Diabolical Reply with quote
Code:

+-------+-------+-------+
| 5 . 4 | . . . | . . 8 |
| . 8 . | . . 9 | . . . |
| . 1 . | 2 . . | . 3 . |
+-------+-------+-------+
| . . . | 9 . . | 4 . 6 |
| . . . | 5 7 6 | . . . |
| 1 . 6 | . . 3 | . . . |
+-------+-------+-------+
| . 4 . | . . 7 | . 8 . |
| . . . | 8 . . | . 2 . |
| 2 . . | . . . | 5 . 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: Sat Jul 22, 2017 10:46 am    Post subject: Reply with quote
25 singles
{6R37} -> -{6r28c1, 6r18c7}; 4 singles
{(73)r2c1, 3r7c17, (37)r8c7} -> -{7r8c1}
{7B7} -> -{7r46c2}; stte
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Ajò Dimonios



Joined: 01 May 2017
Posts: 339
Location: Sassari Italy
PostPosted: Sat Jul 22, 2017 3:14 pm    Post subject: Reply with quote
Hi everyone

Code:

+-------+-------+-------+
| 5 . 4 | . . . | . . 8 |
| . 8 . | . . 9 | . . . |
| . 1 . | 2 . . | . 3 . |
+-------+-------+-------+
| . . . | 9 . . | 4 . 6 |
| . . . | 5 7 6 | . . . |
| 1 . 6 | . . 3 | . . . |
+-------+-------+-------+
| . 4 . | . . 7 | . 8 . |
| . . . | 8 . . | . 2 . |
| 2 . . | . . . | 5 . 1 |
+-------+-------+-------+

Play this puzzle online at the Daily Sudoku site
Solutions with one step .
[(7-9)R8C1=(9)R3C1-(9)R3C7; (7-9)R8C1=(9)R3C1-(9=7)R3C3 (7)R3C7 and -(7)R8C1-(7)R8C7=(7-6)R9C8=(6)R1C8-(6)R3C7]=>contradiction, R3C7=Ø=>-7R8C1=>solution stte.

Ciao a tutti
Paolo
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Clement



Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania
PostPosted: Sun Jul 23, 2017 3:42 pm    Post subject: Daily Sudoku for 21/7/2017-Diabolical Reply with quote
Code:

+----------------------+--------------------+------------------------+
| 5       23679    4   |    367    36     1 |    2679    k67-9    8  |
| 367     8       d237 |    367    5      9 |    1        4      c27 |
| 679     1        79  |    2      4      8 |    679      3       5  |
+----------------------+--------------------+------------------------+
| 8      f357     e37  |    9      1      2 |    4       a57      6  |
| 4       29       29  |    5      7      6 |    8        1       3  |
| 1      f57       6   |    4      8      3 |    279     a579    b27 |
+----------------------+--------------------+------------------------+
| 36      4        5   |    1      2      7 |    36       8       9  |
|h3679   g3679     1   |    8      369    5 |   i367      2       4  |
| 2      g3679     8   |    36     369    4 |    5       j67      1  |
+----------------------+--------------------+------------------------+

(9=57)r46c8 - (7=2)r6c9 -r2c9 = (2-3)r2c3 = r4c3 - (3=57)r46c2 - (7)r89c2 = r8c1 - (7=6)r8c7 - r98 = (6)r1c8 => -9 r1c8; lclste
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