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Ingies
Joined: 19 Mar 2008
Posts: 5
Location: New Zealand
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 Posted: Wed Mar 19, 2008 6:57 am Post subject: March 19 Hard |
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Hello, I have been doing sudokus for awhile and can normally get hard ones out , but struggle on most vh, however I don't see how to do this hard sudoku. I can get this far
| Code: |
+----------------+----------------+-------------------+
| 16 5 4 | 2 9 38 | 136 1368 7 |
| 2 8 17 | 6 5 37 | 13 4 9 |
| 3 69 679 | 1 47 478 | 2 68 5 |
+----------------+----------------+-------------------+
| 16 13469 13569 | 8 2347 457 | 134567 1356 1236 |
| 7 2 135 | 34 6 45 | 1345 9 8 |
| 8 346 356 | 9 2347 1 | 34567 356 236 |
+----------------+----------------+-------------------+
| 5 13 2 | 37 8 6 | 9 137 4 |
| 4 7 8 | 35 1 9 | 356 2 36 |
| 9 136 136 | 3457 34 2 | 8 1357 13 |
+----------------+----------------+-------------------+
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Play this puzzle online at the Daily Sudoku site
When I play it online the hint tells me a 4 goes in R5C4, thus eliminating the 3, can anyone explain how this is done? Or if there are other solutions? Thanks. I have tried to look for X wings and xy chains but am unable to find any. I am not very good with the other techniques that are used in VH sudokus (eg RE UR and BUG) |
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Victor
Joined: 29 Sep 2005
Posts: 207
Location: NI
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| Posted: Wed Mar 19, 2008 10:43 am Post subject: |
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| I'm not sure why it suggests 4 there either. But anyway, in R9 there's a triple 136 (in C239) which kills the 3 in R9C5, making it a 4 - so now R5C4 must indeed be a 4. |
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