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Hard Complicated

 
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Ajò Dimonios



Joined: 01 May 2017
Posts: 339
Location: Sassari Italy
PostPosted: Mon Jun 12, 2017 12:38 pm    Post subject: Hard Complicated Reply with quote
Hi everyone
Code:

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

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: Mon Jun 12, 2017 7:07 pm    Post subject: Reply with quote
Hi everyone

3 swordfish ( line 3, line 4 and line8)=>-3 R17C1,-3 R15C4,-3 R7C9.
5 swordfish ( line 2, line 6 and line 7)=>-5 R1C1, -5 R5C5, -5 R9C9.
6 finned swordfish ( line 2, line 6 and line 7) (fin 6 R6C8)=> -6 R4C9.
(5)R2C1=(5)R2C9-(5=8)R7C9-(8=2)R7C1=>-2R2C1.
(5)R9C4=(5)R9C8-(5)R1C8=(5-6)R2C9=(6)R2C2-6R7C2=(6)R7C6=>-6R9C4-
Code:

+---------------+--------------+--------------+
| 1289 3    128 | 128 6   2489 | 1248 5   7   |
| 5    1289 7   | 128 19  2489 | 1248 3   6   |
| 128  4    6   | 3   7   5    | 9    28  18  |
+---------------+--------------+--------------+
| 2489 7    28  | 6   248 1    | 5    489 3   |
| 6    189  5   | 7   48  3    | 18   489 2   |
| 1248 128  3   | 9   5   28   | 7    6   148 |
+---------------+--------------+--------------+
| 28   6    9   | 4   28  7    | 3    1   5   |
| 3    5    248 | 128 19  289  | 6    7   48  |
| 7    18   148 | 5   3   6    | 28   248 9   |
+---------------+--------------+--------------+

Play this puzzle online at the Daily Sudoku site
2 Fin x-wing (line 4,line6) (fin 2 R4C3)=>-2R6C1
AIC (2)R4C5=(2)R7C5-(2)R7C1=(2)R8C3=>-2R4C3
Code:

+--------------+-------------+--------------+
| 1289 3    12 | 128 6  2489 | 1248 5   7   |
| 5    1289 7  | 128 19 2489 | 1248 3   6   |
| 128  4    6  | 3   7  5    | 9    28  18  |
+--------------+-------------+--------------+
| 249  7    8  | 6   24 1    | 5    49  3   |
| 6    19   5  | 7   48 3    | 18   489 2   |
| 14   12   3  | 9   5  28   | 7    6   148 |
+--------------+-------------+--------------+
| 28   6    9  | 4   28 7    | 3    1   5   |
| 3    5    24 | 128 19 289  | 6    7   48  |
| 7    18   14 | 5   3  6    | 28   248 9   |
+--------------+-------------+--------------+

Play this puzzle online at the Daily Sudoku site
2x-wing(line 4, line 7)=>-2R13C1=>R3C8=2, R9C7.
2 Fin x-wing (line 2, line 6)(fin 2 R2C4)=>-2R1C6.
8 fin swordfish (line 3, line 5, line 7) ( fin 8 R5C78)=>-8R6C9=>stte

Ciao a Tutti
Paolo
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JC Van Hay



Joined: 13 Jun 2010
Posts: 494
Location: Charleroi, Belgium
PostPosted: Mon Jun 12, 2017 9:30 pm    Post subject: Reply with quote
Code:
+------------------------+--------------------------+---------------------+
| 123589  1289(3)  1258  | 1238      6      2489(3) | 1248   2458   7     |
| 12589   12689    7     | 128       12489  2489    | 1248   3      14568 |
| 1238    4        1268  | 12378     1278   5       | 9      268    168   |
+------------------------+--------------------------+---------------------+
| 2489    2789     248   | 278-3(6)  2478   1       | 5      46789  34689 |
| 6       1789     1458  | 3578      4578   478(3)  | 13478  4789   2     |
| 12458   1278     3     | 9         24578  24678   | 1478   4678   1468  |
+------------------------+--------------------------+---------------------+
| 238     28(36)   9     | 4         2578   278(6)  | 2378   1      358   |
| 12348   5        1248  | 1278      12789  2789    | 6      24789  3489  |
| 7       1268     12468 | 1258(6)   3      2689    | 248    24589  4589  |
+------------------------+--------------------------+---------------------+
{6C4R7, 3C26} -> -{3r4c4}; 24 singles; ssts to the end :
Basics : {1B8, 2B9, 4B37, 9B8}, {(19)C5}, {4B2, 2R8C5}, r9c9=9, r4c3=8
XYWing : {(128)r69c2.r7c1} -> -{2r46c1}; stte
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Ajò Dimonios



Joined: 01 May 2017
Posts: 339
Location: Sassari Italy
PostPosted: Mon Jun 12, 2017 10:04 pm    Post subject: Reply with quote
The solution can also be achieved by starting from one of the following hipotheses.
If R1C3=2=>solution basics to the end
If R1C6=4=>solution basics to the end
If R2C2=1=> solution basics to the end
If R2C7=4=>solution basics to the end
If R3C1=8=>solution basics to the end
If R6C6=8=>solution basics to the end
If R7C5=8=>solution basics to the end
If R8C9=8=> solution basics to the end
If R9C3=1=> solution basics to the end
If R9C8=4=> solution basics to the end.
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