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Feb 19 VH

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Ajò Dimonios

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

Posted: Sun Feb 18, 2018 11:09 pm Post subject: Feb 19 VH

Hi everyone

Code:

+-------+-------------+---------+
| 4 1 8 | 26 26 7 | 9 3 5 |
| 5 6 3 | 14 14 9 | 2 7 8 |
| 9 2 7 | 5 38 38 | 1 6 4 |
+-------+-------------+---------+
| 3 4 5 | 18 189 2 | 6 89 7 |
| 2 9 6 | 7 48 5 | 48 1 3 |
| 8 7 1 | 46 3469 34 | 5 49 2 |
+-------+-------------+---------+
| 7 3 9 | 248 248 6 | 48 5 1 |
| 1 5 2 | 9 7 48 | 3 48 6 |
| 6 8 4 | 3 5 1 | 7 2 9 |
+-------+-------------+---------+

Play this puzzle online at the Daily Sudoku site

[1R2C4-(1=8)R4C4 and 1R2C4-(1=4)R2C5-(4=8)R5C5]=>contradiction two 8 in Box 5=>-1R2C4=>solution.

Ciao a Tutti
Paolo

ZeroAssoluto

Joined: 05 Feb 2017
Posts: 942
Location: Rimini, Italy

Posted: Sun Feb 18, 2018 11:31 pm Post subject:

Hi everyone,

Quote:

W-Wing 4,8 in r5c5,r7c7 connected by number 8 in r47c4 and -4 in r5c7,r7c5
or
W-Wing 4,8 in r5c5,r8c6 connected by number 8 in r3c56 and -4 in r6c6,r7c5
or
XY-Wing 1,4,8 in r25c5,r4c4 and -1 in r2c4,r4c5
or
XY-Wing 1,4,8 in r24c4,r5c5 and -4 in r2c5,r6c4
or
XY-Wing 3,4,8 in r35c5,r6c6 and -3 in r3c6,r6c5
or
XY-Wing 3,4,8 in r36c6,r5c5 and -8 in r3c5
or
Skyscraper with number 8 in r47c4,r57c7 and -8 in r4c8,r5c5
or
Skyscraper with number 8 in r47c4,r48c8 and -8 in r7c7,r8c6

Ciao Gianni

Marty R.

Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA

Posted: Mon Feb 19, 2018 5:58 am Post subject:

Code:

┌────────────────────┬────────────────────┬────────────────────┐
│ 4 1 8 │ 26 26 7 │ 9 3 5 │
│ │ │ │
│ 5 6 3 │ 14 14 9 │ 2 7 8 │
│ │ │ │
│ 9 2 7 │ 5 38 38 │ 1 6 4 │
├────────────────────┼────────────────────┼────────────────────┤
│ 3 4 5 │ 18 189 2 │ 6 89 7 │
│ │ │ │
│ 2 9 6 │ 7 48 5 │ 48 1 3 │
│ │ │ │
│ 8 7 1 │ 46 3469 34 │ 5 49 2 │
├────────────────────┼────────────────────┼────────────────────┤
│ 7 3 9 │ 248 248 6 │ 48 5 1 │
│ │ │ │
│ 1 5 2 │ 9 7 48 │ 3 48 6 │
│ │ │ │
│ 6 8 4 │ 3 5 1 │ 7 2 9 │
└────────────────────┴────────────────────┴────────────────────┘

Simple coloring (8) 8r3c6=r8c6-r8c8=r7c7-r5c7=r5c5=> -8r3c5

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