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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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 Posted: Sun Sep 10, 2017 5:37 am Post subject: VH091017 |
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| Code: | *-----------*
|..6|.74|.1.|
|.3.|6..|9..|
|9..|..1|56.|
|---+---+---|
|7..|56.|2..|
|...|.3.|...|
|..3|.19|..7|
|---+---+---|
|.28|1..|..3|
|..7|..5|.2.|
|.9.|72.|4..|
*-----------*
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Play/Print this puzzle online |
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ZeroAssoluto
Joined: 05 Feb 2017
Posts: 942
Location: Rimini, Italy
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| Posted: Sun Sep 10, 2017 7:48 am Post subject: |
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Hi everyone,
| Code: |
+-----------------+---------+--------------+
| 258 58 6 | 9 7 4 | 3 1 28 |
| 148 3 14 | 6 5 2 | 9 7 48 |
| 9 7 24 | 3 8 1 | 5 6 24 |
+-----------------+---------+--------------+
| 7 14 149 | 5 6 8 | 2 3 19 |
| 12568 1568 1259 | 24 3 7 | 168 459 1569 |
| 2568 568 3 | 24 1 9 | 68 45 7 |
+-----------------+---------+--------------+
| 45 2 8 | 1 49 6 | 7 59 3 |
| 3 146 7 | 8 49 5 | 16 2 169 |
| 156 9 15 | 7 2 3 | 4 8 156 |
+-----------------+---------+--------------+
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Play this puzzle online at the Daily Sudoku site
| Quote: | | XY-Wing 1,4,5 in r29c3,r7c1 and -4 in r2c1 |
Ciao Gianni |
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Ajò Dimonios
Joined: 01 May 2017
Posts: 339
Location: Sassari Italy
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| Posted: Sun Sep 10, 2017 1:22 pm Post subject: |
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Hi everyone
[(9-5)R5C3=(5)R9C3-(5=4)R7C1 and (9)R5C3-(9)R5C89=(9)R4C9-(9)R8C9=(9)R7C8-(9=4)R7C5]=>contradiction two singles 4 in line 7=>-9R5C3=>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: Sun Sep 10, 2017 9:46 pm Post subject: |
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Hi everyone
Other solutions
[(1-4)R4C2=(4)R8C2-(4=5)R7C1-(5)R9C3 and (1-4)R4C2=(4)R4C3-(4=1)R2C3-(1)R9C3]=>contradiction R9C3=Ø=>-1R4C2=>solution stte.
With the same demostration are valid other solutions biunivocal to each other:
-4R4C3 or -5R5C3 or -4R7C5 or -9R7C8 or -4R8C2 or -9R8C5 or -1R9C3 and -5R9C9.
Ciao a Tutti
Paolo |
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immpy
Joined: 06 May 2017
Posts: 571
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| Posted: Mon Sep 11, 2017 12:12 am Post subject: |
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Another possible solution...
W-Wing (45) b67, connected by 4. r6c1<>5; r7c8<>5.
Nice puzzle. |
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