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Hard Complicated I

 
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Ajò Dimonios



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

PostPosted: Mon Jul 03, 2017 10:07 pm    Post subject: Hard Complicated I Reply with quote

Hi everyone

Code:

+-------+-------+-------+
| 3 . . | . . 8 | . . . |
| 8 1 7 | . . . | . . . |
| . . . | . 3 . | . 2 . |
+-------+-------+-------+
| . . 6 | . 2 . | 5 . . |
| 5 3 . | 4 7 6 | . 8 9 |
| . . 9 | . 8 . | 4 . . |
+-------+-------+-------+
| . 6 . | . 9 . | . . . |
| . . . | . . . | 9 4 1 |
| . . . | 3 . . | . . 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: Tue Jul 04, 2017 9:49 am    Post subject: Reply with quote

"Basics" : 8 singles, N-Fishes{1C158, 1R5; 2B1; 2R5, 2C9; 7B4} -> -{1r7c46, 1r9c3; 2L1C4; 2L7C3; 7L6C9}
Kraken 5B8 -> r5c3=1; stte
Code:
+-----------------------+-------------------------+----------------------+
| 3      45(29)  45(2)  | 15(679)  145    8       | 1(67)  5(179)  45(7) |
| 8      1       7      | 2569     45     2459    | 36     359     345   |
| 6      459     45     | 1579     3      14579   | 178    2       4578  |
+-----------------------+-------------------------+----------------------+
| 4      8       6      | 19       2      139     | 5      3(17)   3(7)  |
| 5      3       -2(1)  | 4        7      6       | 2(1)   8       9     |
| 27(1)  (27)    9      | (15)     8      135     | 4      6       23    |
+-----------------------+-------------------------+----------------------+
| 27(1)  6       58(14) | 27(5)    9      27(45)  | 2378   357     23578 |
| 27     (257)   3      | 8        6      27(5)   | 9      4       1     |
| 9      2457    2458   | 3        14(5)  1247(5) | 278    (57)    6     |
+-----------------------+-------------------------+----------------------+
r7c4=5 -> r6c4=r5c3=1
r7c6=5 -> r7c3=4, r7c1=r5c3=1
r8c6=5 -> NP(27)r68c2, r1c3=2, r5c3=1
r9c56=5 -> r9c8=r4c9=7, HP(67)r1c47, [1r5c3=1r5c7-1r4c8=(1-9)r1c8=(9-2)r1c2=2r1c3]-(2=1)r5c3
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Ajò Dimonios



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

PostPosted: Tue Jul 04, 2017 8:47 pm    Post subject: Reply with quote

Hi everyone

My solution


Code:

+---------------------+------------------+------------------+
| 3     2459   245    | 15679 1456 8     | 167  15679 457   |
| 8     1      7      | 2569  456  2459  | 36   3569  345   |
| 469   459    45     | 15679 3    14579 | 1678 2     4578  |
+---------------------+------------------+------------------+
| 147   478    6      | 19    2    139   | 5    137   37    |
| 5     3      12     | 4     7    6     | 12   8     9     |
| 127   27     9      | 15    8    135   | 4    1367  23    |
+---------------------+------------------+------------------+
| 1247  6      123458 | 12578 9    12457 | 2378 357   23578 |
| 27    2578   2358   | 25678 56   257   | 9    4     1     |
| 12479 245789 12458  | 3     145  12457 | 278  57    6     |
+---------------------+------------------+------------------+

Play this puzzle online at the Daily Sudoku site

Four-step solution with trial and error strategy.
R1C3=2=>error , two singles 7 in line 3=>-2R1C3
R1C4=1=>error, two singles 5 in box 9 =>-1R1C4
R3C4=1=> error, R4C9=Ø=> -1R3C4
R3C6=1=> error, R2C7=Ø=>-1R3C6=> solution stte.
Code:

+---------------------+------------------+------------------+
| 3     2459   45     | 5679  1456 8     | 167  15679 457   |
| 8     1      7      | 2569  456  2459  | 36   3569  345   |
| 469   459    45     | 5679  3    4579  | 1678 2     4578  |
+---------------------+------------------+------------------+
| 147   478    6      | 19    2    139   | 5    137   37    |
| 5     3      12     | 4     7    6     | 12   8     9     |
| 127   27     9      | 15    8    135   | 4    1367  23    |
+---------------------+------------------+------------------+
| 1247  6      123458 | 12578 9    12457 | 2378 357   23578 |
| 27    2578   2358   | 25678 56   257   | 9    4     1     |
| 12479 245789 12458  | 3     145  12457 | 278  57    6     |
+---------------------+------------------+------------------+

Play this puzzle online at the Daily Sudoku site

Ciao a tutti
Paolo
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