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very hard VI

 
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AjÚ Dimonios



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

PostPosted: Mon Aug 21, 2017 4:52 pm    Post subject: very hard VI Reply with quote

Hi everyone

Code:

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

Play this puzzle online at the Daily Sudoku site

Ciao a Tutti
Paolo
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JC Van Hay



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

PostPosted: Mon Aug 21, 2017 8:30 pm    Post subject: Reply with quote

8 singles; exclusions by the solutions of the 3s, the 5s and C2
Code:
+-------------------------+-------------------+-------------------+
| 2      56      89       | 7       159   159 | 1389  3468   1489 |
| 789    1       4        | 38      39    6   | 2     5      789  |
| 3      56      789      | 158     4     2   | 189   68     1789 |
+-------------------------+-------------------+-------------------+
| 1458   7       2        | 9       135   135 | 6     348    458  |
| 14589  39(8)   189(3)   | 135(4)  6     7   | 389   (348)  2    |
| 459    9(3)    6        | 5(34)   2     8   | 7     1      459  |
+-------------------------+-------------------+-------------------+
| 6      4       19       | 2       8     159 | 15    7      3    |
| 178    2       5        | 6       137   13  | 4     9      18   |
| 1789   9-3(8)  179-8(3) | 15      1579  4   | 158   2      6    |
+-------------------------+-------------------+-------------------+
3r9c3 3r5c3
      3r6c2 3r6c4
            4r6c4 4r5c4
      3r5c8       4r5c8 8r5c8
                        8r5c2 8r9c2 -> 3r9c3==8r9c2 => -{3r9c2, 8r9c3}; 3 singles
Code:
+-----------------------+-----------------------+--------------------+
| 2        56     9(8)  | 7       159     159   | 1389   3468  1489  |
| (89)     1      4     | 8-3     (39)    6     | 2      5     7     |
| 3        56     7     | 158     4       2     | 189    68    189   |
+-----------------------+-----------------------+--------------------+
| 1458     7      2     | 9       15-3    135   | 6      348   458   |
| 1489(5)  (389)  19(8) | 134(5)  6       7     | 38(9)  348   2     |
| 49(5)    9(3)   6     | 4(35)   2       8     | 7      1     4(59) |
+-----------------------+-----------------------+--------------------+
| 6        4      (19)  | 2       8       1(59) | 15     7     3     |
| (178)    2      5     | 6       13(7)   13    | 4      9     18    |
| 1789     89     3     | 1(5)    1(579)  4     | 158    2     6     |
+-----------------------+-----------------------+--------------------+
Kraken Cell (389)r5c2 -> 3r6c4==3r2c5 => -{3r2c4, 3r4c5}; 5 singles; exclusion by the solutions of R4; stte
3r5c2-3r6c2=3r6c4
||
8r5c2-8r5c3=8r1c3-(8=93)r2c14
||
9r5c2-9r5c7=(9-5)r6c9=XWing(5r56c14)-5r9c4=HP(59-7)r7c6.r9c5=7r8c5-7r8c1=*[(9=*81)r28c1-(1=9)r7c3-9r7c6=9r9c5]-(9=3)r2c5
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AjÚ Dimonios



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

PostPosted: Mon Aug 21, 2017 10:01 pm    Post subject: Reply with quote

Hi everyone
Code:

+------------------+---------------+----------------+
| 2     5689 89    | 7    159  159 | 1389 3468 1489 |
| 789   1    4     | 38   39   6   | 2    5    789  |
| 3     5689 789   | 158  4    2   | 189  68   1789 |
+------------------+---------------+----------------+
| 1458  7    2     | 9    135  135 | 6    348  458  |
| 14589 389  1389  | 1345 6    7   | 389  348  2    |
| 459   39   6     | 345  2    8   | 7    1    459  |
+------------------+---------------+----------------+
| 6     4    19    | 2    8    159 | 15   7    3    |
| 178   2    5     | 6    137  13  | 4    9    18   |
| 1789  389  13789 | 15   1579 4   | 158  2    6    |
+------------------+---------------+----------------+

Play this puzzle online at the Daily Sudoku site

R4C1=1 => singles and locked candidates to the error =>-1R4C1
R4C6=3 => singles and locked candidates to the error =>-3R4C6
R4C5=5 => singles and locked candidates to the error =>-5R4C5
R4C8=4 => singles and locked candidates to the error =>-4R4C8
R5C1=1 => singles and locked candidates to the error =>-1R5C1=>stte.

Ciao a Tutti
Paolo
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