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ZeroAssoluto
Joined: 05 Feb 2017
Posts: 1019
Location: Rimini, Italy
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 Posted: Fri Jul 14, 2017 10:11 pm Post subject: Jul 15 VH |
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Hi everyone,
| Code: |
+------------+---------------+--------------+
| 48 9 246 | 478 2348 1 | 367 5 46 |
| 7 3 1 | 6 5 49 | 8 2 49 |
| 5 28 246 | 478 23489 249 | 3679 39 1 |
+------------+---------------+--------------+
| 13 6 8 | 45 49 459 | 2 139 7 |
| 134 5 34 | 2 6 7 | 139 1389 89 |
| 9 27 27 | 18 18 3 | 4 6 5 |
+------------+---------------+--------------+
| 2 78 57 | 145 14 456 | 169 189 3 |
| 6 1 9 | 3 7 8 | 5 4 2 |
| 38 4 35 | 9 12 256 | 16 7 68 |
+------------+---------------+--------------+
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Play this puzzle online at the Daily Sudoku site
I chose this option
| Quote: | | XY-Wing 4,6,8 in r1c1, r1c9, r9c9 and -8 in r9c1 |
Ciao Gianni |
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Ajò Dimonios
Joined: 01 May 2017
Posts: 339
Location: Sassari Italy
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| Posted: Sat Jul 15, 2017 5:56 am Post subject: |
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Hi everyone
One step solution.
Forcing chain [(6)R9C9-(6=4)R1C9 and (6-8)R9C9=(8)R9C1-(8=4)R1C1]=>contradiction, two singles 4 in line 1=>-6R9C9=>solution stte.
Ciao a tutti
Paolo |
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Ajò Dimonios
Joined: 01 May 2017
Posts: 339
Location: Sassari Italy
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| Posted: Sat Jul 15, 2017 2:21 pm Post subject: |
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Hi everyone
Another one step solution.
Forcing chain [(2)R1C3-(2=8)R3C2-(8=4)R1C1-(4=6)R1C9 and (2)R1C3-(2=7)R6C3-(7)R7C3=(7-8)R7C2=(8)R9C1-(8=6)R9C9]=>contradiction, two singles 6 in column 9=>-2R1C3=>solution stte.
Ciao a tutti
Paolo |
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