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very hard II

 
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Ajò Dimonios



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

PostPosted: Fri Jun 16, 2017 10:26 pm    Post subject: very hard II Reply with quote

Hi everyone

Code:

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

Play this puzzle online at the Daily Sudoku site

Ciao a Tutti
Paolo
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Ajò Dimonios



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

PostPosted: Sun Jun 18, 2017 9:35 pm    Post subject: Reply with quote

Hi everyone


Code:

+----------------+--------------+---------------+
| 57  9    257   | 18  18   6   | 257  3    4   |
| 6   1378 137   | 5   2    4   | 179  179  89  |
| 458 148  1245  | 9   3    7   | 6    125  58  |
+----------------+--------------+---------------+
| 458 1348 6     | 148 158  9   | 2345 245  7   |
| 2   348  345   | 468 7    35  | 3459 4569 1   |
| 9   1347 13457 | 2   156  135 | 8    456  356 |
+----------------+--------------+---------------+
| 47  2    8     | 16  1569 15  | 3479 4679 369 |
| 3   6    9     | 7   4    8   | 15   15   2   |
| 1   5    47    | 3   69   2   | 479  8    69  |
+----------------+--------------+---------------+

Play this puzzle online at the Daily Sudoku site



7 fin X-wing (line 1, line 9, fin 7 R1C1)=>-7 R2C3
Empty rectangle( box 9 line 1)=>-7 R1C7 or discontinuous nice loop (7)R1C7-R1C1=R7C1-R7C78=R9C7-(7)R1C7=>-7 R1C7
4 fin X-wing (line 6, line 9, fin 4 R6C8)=>-4 R45C7=>-4R7C8
AIC (5)R8C8=(5)R8C7-(5=2)R1C7-(2)R3C8=NP(15)R38C8=>-5R56C8
AIC (5)R3C9=(5)R6C9-(5=6)R6C5-(6=4)R6C8- (4=2)R4C8-(2)R3C8=(2-5)R1C7=>-5R1C7
AIC (3=5)R4C7-(5)R4C1=(5-7)R1C1=(7-4)R7C1=(4-3)R7C7=(3)R7C9-(3)R6C9=>-3R6C9, -3R7C7.=>R7C9=3
Code:

+---------------+--------------+------------+
| 57  9    57   | 18  18   6   | 2   3   4  |
| 6   138  13   | 5   2    4   | 179 179 89 |
| 48  148  2    | 9   3    7   | 6   15  58 |
+---------------+--------------+------------+
| 458 1348 6    | 148 158  9   | 35  2   7  |
| 2   348  345  | 468 7    35  | 359 469 1  |
| 9   7    1345 | 2   156  135 | 8   46  56 |
+---------------+--------------+------------+
| 47  2    8    | 16  1569 15  | 479 679 3  |
| 3   6    9    | 7   4    8   | 15  15  2  |
| 1   5    47   | 3   69   2   | 47  8   69 |
+---------------+--------------+------------+

Play this puzzle online at the Daily Sudoku site


xy chain (3=5)R4C7-(5=6)R6C9-(6=9)R9C9-(9=6)R9C5-(6=1)R7C4-(1=5)R7C6-(5=3)R5C6-(3)R5C7=>-3R5C7=>R4C7=3.



XY- wing (9=5)R5C7-(5=6)R6C9-(6=9)R9C9-(9)R7C7=>-9R7C7.
NP(47)column 7=>-7R2C7,-7R7C8=>R2C8=7.


XY chain (1=3)R2C3-(3=1)R6C3-(1=3)R6C6-(3=5R5C6-(5=4)R5C3-(4=7)R9C3-(7=4)R7C1-(4=8)R3C1-(8=5)R3C9-(5=1)R3C8=>-1R2C7, -1R3C2=>stte.


Ciao a Tutti
Paolo
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