Please help me solve this extreme puzzle from websudoku.com

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Please help me solve this extreme puzzle from websudoku.com

Postby genarun » Sat Mar 04, 2017 1:29 am

Screenshot_2017-03-04-06-22-02-1.png
Screenshot_2017-03-04-06-22-02-1.png (118.72 KiB) Viewed 101 times
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Re: Please help me solve this extreme puzzle from websudoku.

Postby JasonLion » Sat Mar 04, 2017 12:16 pm

A locked candidate will reveal a naked pair that moves you about half the way to solving this puzzle. Naked pair is the most complex technique you need to use to solve the whole puzzle.

...5...7..34..9652..52.31..58.9.........8.........2.89..23.4...3.96..7...5...1...
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Re: Please help me solve this extreme puzzle from websudoku.

Postby Leren » Sat Mar 04, 2017 9:22 pm

If you look at Box 6 you will see that the three 4's in Row 4 Cols 789 are the only ones in that row, so one of them must be True in the solution. This means that you can remove the 4's in Box 6 that are not in Row 4. There should be 4 such eliminations. When you do that you should be able to see a naked pair (35) in Rows 5 and 6 Column 7, so you can remove 3 and 5 from other cells in Column 7 and Box 6. That should give you some progress. See if you can solve the puzzle from there.

Here is a diagram of the naked pair eliminations.

Code: Select all
*-----------------------------------------------------------------------*
| 12689  1269   168     | 5      146    68      | 489-3  7      348     |
| 178    3      4       | 78     17     9       | 6      5      2       |
| 6789   679    5       | 2      467    3       | 1      49     48      |
|-----------------------+-----------------------+-----------------------|
| 5      8      136     | 9      36     67      | 24-3   1246-3 1467-3  |
| 12469  12469  136     | 14     8      567     |*35     16-3   167-35  |
| 1467   1467   1367    | 14     356    2       |*35     8      9       |
|-----------------------+-----------------------+-----------------------|
| 1678   167    2       | 3      579    4       | 89-5   169    1568    |
| 3      14     9       | 6      25     58      | 7      124    1458    |
| 4678   5      678     | 78     279    1       | 2489-3 23469  3468    |
*-----------------------------------------------------------------------*

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Re: Please help me solve this extreme puzzle from websudoku.

Postby genarun » Sun Mar 05, 2017 3:37 am

Thx Leren and Jason lion. Very grateful to the creator of this forum too
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Please help me solve this extreme puzzle from websudoku.com

Postby genarun » Sun Mar 05, 2017 4:43 am

Screenshot_2017-03-05-09-11-52-1.png
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Re: Please help me solve this extreme puzzle from websudoku.

Postby Leren » Sun Mar 05, 2017 7:11 pm

This looks like the same status of the same puzzle. Do you need any further help ?

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Re: Please help me solve this extreme puzzle from websudoku.

Postby genarun » Mon Mar 06, 2017 12:47 am

Please pardon me. Posted the same by mistake.
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