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VH+ 070517

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immpy

Joined: 06 May 2017
Posts: 574

Posted: Wed Jul 05, 2017 2:20 pm Post subject: VH+ 070517

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Enjoy the puzzle.....

Code:

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

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Ajò Dimonios

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

Posted: Wed Jul 05, 2017 6:40 pm Post subject:

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Hi everyone

Code:

+----------+-----------------+--------+
| 8 1 29 | 29 5 3 | 4 7 6 |
| 24 7 269 | 12489 2689 1469 | 3 18 5 |
| 34 5 36 | 7 68 146 | 2 18 9 |
+----------+-----------------+--------+
| 5 8 12 | 124 7 14 | 9 6 3 |
| 6 9 4 | 5 3 8 | 1 2 7 |
| 27 3 127 | 129 269 169 | 5 4 8 |
+----------+-----------------+--------+
| 9 2 8 | 3 4 7 | 6 5 1 |
| 1 6 5 | 89 89 2 | 7 3 4 |
| 37 4 37 | 6 1 5 | 8 9 2 |
+----------+-----------------+--------+

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Solution with one step.
Forcing chain [(4-2)R2C1=(2)R12C3-(2)R4C3 and (4)R2C1-(4)R2C46=(4)R3C6-(4)R4C6]=>contradiction two singles 1 in line 4 (R4C3,R4C6)=>-4R2C1

Ciao a tutti
Paolo

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JC Van Hay

Joined: 13 Jun 2010
Posts: 494
Location: Charleroi, Belgium

Posted: Wed Jul 05, 2017 7:09 pm Post subject:

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Code:

+---------------+---------------------+----------+
| 8 1 9(2) | 9(2) 5 3 | 4 7 6 |
| (24) 7 269 | 1289(4) 2689 1469 | 3 18 5 |
| 34 5 36 | 7 68 146 | 2 18 9 |
+---------------+---------------------+----------+
| 5 8 12 | 1-2(4) 7 14 | 9 6 3 |
| 6 9 4 | 5 3 8 | 1 2 7 |
| 27 3 127 | 129 269 169 | 5 4 8 |
+---------------+---------------------+----------+
| 9 2 8 | 3 4 7 | 6 5 1 |
| 1 6 5 | 89 89 2 | 7 3 4 |
| 37 4 37 | 6 1 5 | 8 9 2 |
+---------------+---------------------+----------+

S-Wing[4r4c4=4r2c4-(4=2)r2c1-2r1c3=2r1c4]-2r4c4; stte

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Marty R.

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

Posted: Thu Jul 06, 2017 5:23 am Post subject:

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Code:

+----------+-----------------+--------+
| 8 1 29 | 29 5 3 | 4 7 6 |
| 24 7 269 | 12489 2689 1469 | 3 18 5 |
| 34 5 36 | 7 68 146 | 2 18 9 |
+----------+-----------------+--------+
| 5 8 12 | 124 7 14 | 9 6 3 |
| 6 9 4 | 5 3 8 | 1 2 7 |
| 27 3 127 | 129 269 169 | 5 4 8 |
+----------+-----------------+--------+
| 9 2 8 | 3 4 7 | 6 5 1 |
| 1 6 5 | 89 89 2 | 7 3 4 |
| 37 4 37 | 6 1 5 | 8 9 2 |
+----------+-----------------+--------+

Play this puzzle online at the Daily Sudoku site

DP (14) r24c46 externals

4r2c1=1r2c8=1r4c3
4r2c1-(4=372)r396c1-(2=1)r4c3-(1=4)r4c6
1r2c8-r2c4=1r46c4-(1=4)r4c6
1r4c3-(1=4)r4c6=> 4r4c6

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immpy

Joined: 06 May 2017
Posts: 574

Posted: Fri Jul 07, 2017 9:40 pm Post subject:

There is an early X-Wing on (2) in rows 1 and 4. This removes the 2 from r2c34 and 6c34. While I usually don't go searching for fish, there was a sashimi swordfish on (9) in the middle columns that caught my eye. Of course it can be bypassed as others have done.

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