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Ajò Dimonios



Joined: 01 May 2017
Posts: 339
Location: Sassari Italy
PostPosted: Mon Jun 26, 2017 4:45 pm    Post subject: hard Reply with quote
Hi everyone

Code:

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

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: Tue Jun 27, 2017 12:09 pm    Post subject: Reply with quote
Hi everyone



One of the possible solutions

Code:

+-----------------+-------------+------------------+
| 289  7    248   | 19 38   6   | 1489  138  5     |
| 6    459  458   | 57 3578 149 | 14789 2    34789 |
| 589  3    1     | 2  578  49  | 4789  78   6     |
+-----------------+-------------+------------------+
| 13   46   3467  | 8  2    5   | 14679 167  479   |
| 258  256  9     | 4  1    7   | 3     568  28    |
| 1258 245  24578 | 6  9    3   | 12478 1578 2478  |
+-----------------+-------------+------------------+
| 7    19   23    | 19 6    8   | 5     4    23    |
| 2359 8    2356  | 57 4    29  | 267   367  1     |
| 4    1256 256   | 3  57   12  | 2678  9    278   |
+-----------------+-------------+------------------+

Play this puzzle online at the Daily Sudoku site

2 fin swordfish (column 2, column 6, column 7, fin 2 R5C2)= >-2 R6C13
5 fin x wing (line 3, line 9, fin 5 R9C23)=>-5 R8C1
9 Skyscraper (line7,column 2, column 4)=>-9 R1C1 and -9 R2C6
9 X wing (column 1, column 6) =>-9 R3C7
xyz wing 239 Pivot R8C1, pincers R7C3 and R8C6=>-2R8C3
(8)R1C7-(9)R1C7=(9)R1C4-(9)R7C4=(9-2)R8C6=(2-1)R9C6=(1-4)R2C6=(4)R3C7-(4)R3C8=NP(78)R3C78-(8)R1C7=>-8R1C7.
(1)R6C7-(1)R6C1=(1-3)R4C1=(3)R4C3-(3)R78C3=(3)R8C1-(3)R8C8=(3-1)R1C8=(1)R46C8-(1)R6C7=>-1R6C7.
(2)R9C2-(1)R9C2=(1)R9C6-(1)R2C6=(1)R1C4-(1)R7C4=(1-9)R7C2=(9)R7C4-(9)R1C4=(9-4)R1C7=(4-2)R1C3=(2)R1C1-(2)R5C1=(2)R56C2-(2)R9C2=>-2R9C2.
AIC (1)R2C7=(1)R2C6-(1=2)R9C6-(2=9)R8C6-(9=4)R3C6-(4)R3C7-NP(78)R3C78=>-(78)R2C7=>-2R5C1(locked candidates )
(5-2)R6C2=(2)R6C79-(2)R5C9=(2-6)R5C2=(6-5)R5C8=(5)R5C12.(5)R6C2=>-5R6C2.
(2)R7C9-(2=8)R5C9-(8=5)R5C1-(5)R3C1=(5)R3C5-(5)R9C5=(5-7)R8C4=(7)R8C78-(7)R9C9=NP(28)R59C9-(2)R7C9=>-2R7C9.
Code:

+-------------+----------+-----------------+
| 2   7   4   | 19 8  6  | 19    3    5    |
| 6   59  58  | 57 3  14 | 149   2    4789 |
| 589 3   1   | 2  57 49 | 478   78   6    |
+-------------+----------+-----------------+
| 13  46  367 | 8  2  5  | 14679 167  479  |
| 58  256 9   | 4  1  7  | 3     568  28   |
| 158 24  578 | 6  9  3  | 2478  1578 2478 |
+-------------+----------+-----------------+
| 7   19  2   | 19 6  8  | 5     4    3    |
| 39  8   356 | 57 4  29 | 267   67   1    |
| 4   156 56  | 3  57 12 | 2678  9    278  |
+-------------+----------+-----------------+

Play this puzzle online at the Daily Sudoku site


7 fin x wing (line 2, line 8, fin 7 R8C78)=>-7 R9C9.
Code:

+-------------+----------+---------------+
| 2   7   4   | 19 8  6  | 19   3    5   |
| 6   59  8   | 57 3  14 | 149  2    479 |
| 59  3   1   | 2  57 49 | 478  78   6   |
+-------------+----------+---------------+
| 13  46  367 | 8  2  5  | 4679 167  479 |
| 58  256 9   | 4  1  7  | 3    568  28  |
| 158 24  57  | 6  9  3  | 2478 1578 47  |
+-------------+----------+---------------+
| 7   19  2   | 19 6  8  | 5    4    3   |
| 39  8   356 | 57 4  29 | 267  67   1   |
| 4   156 56  | 3  57 12 | 2678 9    28  |
+-------------+----------+---------------+

Play this puzzle online at the Daily Sudoku site
5 fin x wing (line 2, line 8, fin 5 R8C3)=>-5 R9C2.
Code:

+-----------+----------+------------+
| 2  7  4   | 19 8  6  | 19  3   5  |
| 6  59 8   | 57 3  14 | 149 2   79 |
| 59 3  1   | 2  57 49 | 47  8   6  |
+-----------+----------+------------+
| 13 4  36  | 8  2  5  | 679 167 79 |
| 8  56 9   | 4  1  7  | 3   56  2  |
| 15 2  7   | 6  9  3  | 8   15  4  |
+-----------+----------+------------+
| 7  19 2   | 19 6  8  | 5   4   3  |
| 39 8  356 | 57 4  29 | 267 67  1  |
| 4  16 56  | 3  57 12 | 267 9   8  |
+-----------+----------+------------+

Play this puzzle online at the Daily Sudoku site

7 x wing (line 3, line 9,)=>-7 R48C7.
(9)R2C2-(9)R2C9=(9)R4C9-(9=6)R4C7-(6=5)R5C8-(5)R5C2=(5-9)R2C2=>-(9)R2C2=>stte.


Ciao a tutti

Paolo
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