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Sep 21 VH

 
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ZeroAssoluto



Joined: 05 Feb 2017
Posts: 868
Location: Rimini, Italy

PostPosted: Wed Sep 20, 2017 10:15 pm    Post subject: Sep 21 VH Reply with quote

Hi everyone,

Code:

+----------+----------+------------+
| 38 78 1  | 9 23  27 | 5    4  6  |
| 6  4  2  | 5 1   8  | 9    7  3  |
| 39 5  79 | 4 36  67 | 2    1  8  |
+----------+----------+------------+
| 18 9  6  | 2 5   4  | 1378 38 17 |
| 7  3  5  | 8 9   1  | 4    6  2  |
| 2  18 4  | 6 7   3  | 18   5  9  |
+----------+----------+------------+
| 5  6  8  | 7 24  9  | 13   23 14 |
| 4  2  3  | 1 68  56 | 78   9  57 |
| 19 17 79 | 3 248 25 | 6    28 45 |
+----------+----------+------------+

Play this puzzle online at the Daily Sudoku site

Quote:
XY-Wing 1,3,8 in r4c8,r67c7 and -3 in r4c7,r7c8
or
XY-Wing 1,7,8 in r4c9,r68c7 and -7 in r4c7,r8c9
or
XY-Wing 2,4,5 in r7c5,r9c69 and -4 in r7c9,r9c5
or
XYZ-Wing 2,4,8 in r79c5,r9c8 and -2 in r9c6


Ciao Gianni
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Ajò Dimonios



Joined: 01 May 2017
Posts: 339
Location: Sassari Italy

PostPosted: Thu Sep 21, 2017 9:11 am    Post subject: Reply with quote

Hi everyone


[(1)R4C9-(1=8)R6C7 and (1-7)R4C9=(7)R8C9-(7=8)R8C7=>contradiction two singles 8 in column 7=>-1R4C9=>stte.

Ciao a Tutti

Paolo
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