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a-sudoku 18/09/2017

 
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Ajò Dimonios



Joined: 01 May 2017
Posts: 339
Location: Sassari Italy
PostPosted: Thu Sep 21, 2017 9:45 am    Post subject: a-sudoku 18/09/2017 Reply with quote
Hi everyone


Code:

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

Play this puzzle online at the Daily Sudoku site

Ciao a Tutti

Paolo
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Ajò Dimonios



Joined: 01 May 2017
Posts: 339
Location: Sassari Italy
PostPosted: Sun Feb 18, 2018 10:18 pm    Post subject: Reply with quote
Hi everyone


9R4C2=> contradiction (R1C5=Ø)=>-9R4C2
7R2C4=> contradiction (R3C8=Ø)=>-7R2C4
7R3C4=> contradiction (R4C9=Ø)=>-7R3C4
7R2C6=> contradiction (R5C1=Ø)=>-7R2C6=>solution.


Ciao a Tutti

Paolo
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