A help is needed

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A help is needed

Postby syxQn » Sun Feb 23, 2014 11:12 pm

I'm very new to these kind of methods, which i read about them only recently: hidden/naked pairs/triples/quads..
and i kinda jumped to deep water and trying to solve 5 sudokus combined.
tell me if im right, please. if im wrong, i'd like an explanation

in pic 1 BELOW: the LEFT block - is there a hidden quad of 2-5-7-9 in cells: 2, 3, 8, 9? which means i can rule out 2-5-7-9 in any other cell?
the digit 3 is being discovered in cell 5, therfore 6 is being discovered in cell 7. true or false?

in pic 1 BELOW: the RIGHT block - is there a hidden quad of 2-4-5-9 in cells: 1, 5, 7, 8? which means i can rule out 2-4-5-9 in any other cell?
the digit 1 is being discovered in cell 3, therfore the digit 6 is being discovered in cell 6 (no other 6 candidate) and 8 is being discovered on cell 9. true or false?
http://www.siz.co.il/my.php?i=mjvmmjilggze.jpg
111.JPG
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in pic 2 BELOW: the LEFT block - is there a hidden quad of 2-5-8-9 in cells: 3, 4, 5, 9? which means i can rule out 2-5-8-9 in any other cell?
i only get the result of two digits (1, 4) in cells 7 and 8. true or false?
http://www.siz.co.il/my.php?i=a1jyjz0yeyey.jpg
222.JPG
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in pic 3 BELOW: the SECOND row - is there a hidden quad of 2-5-8-9 again in row 2, collumns 4, 5, 6, 8? which means i can rule out 5, 9 in collumn 9?
the digit 6 is being discovered in collumn 9. true or false?
http://www.siz.co.il/my.php?i=mnct5nkty1in.jpg
333.JPG
333.JPG (119.92 KiB) Viewed 341 times
Last edited by syxQn on Mon Feb 24, 2014 2:52 am, edited 1 time in total.
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Re: A help is needed

Postby JasonLion » Mon Feb 24, 2014 2:03 am

I don't see any pictures, so can't see the puzzles you are commenting on. However, there does appear to be something wrong with your logic. You appear to be mixing up properties of hidden and naked quads.

A hidden quad, four candidates that only appear in four cells of a house, allows you to eliminate all other candidates in the four cells that make up a quad.

A naked quad, four candidates sharing four cells in a house with no other candidates, allows you to eliminate the candidates in the quad from all other cells in the house that are not part of the quad.
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Re: A help is needed

Postby JasonLion-Admin » Mon Feb 24, 2014 12:18 pm

Now that I can see the pictures, there are not any hidden quads in any of those pictures. Read the definition I gave above. In all of your examples the specified candidates also appear in other cells, which violates the definition.
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