The New Sudoku Players' Forum

[santa]

pg 101 I can get reasonably close, but I'm totally stuck.


the original is as follows:

6..|.34|...
58.|...|...
...|9..|.8.
...|.9.|.65
.3.|.1.|...
4..|...|7..
..1|..8|.37
9..|5..|...
.4.|...|5..

I have been able to deduce the following:


6....1279...279|.8..3...4 | 12....5...129
5.....8.....349|12..6..12 | 34....7...349
13...12.....234|.9..5...7 |12346..8...12346

178..127....278|74..9..23 |12348..6...5
78...3...256789|74..1..56 |248....249.248
4....1269..2569|23..8..56 |.7.....129.123
2....5.......1.| 6..4...8 |.9.....3...7
9....67....3678| 5..27.13 |12468..124.12468
378..4.....3678|13..27..9 |.5.....12..1268

I am something of a beginner and I'm totally stumped. I have checked and the single numbers in my partial solution are correct but I cannot logically go any further.

[daj95376]

Code: Select all

+--------------------------------------------------------------------------------------+
|  6        1279     279     |  8        3        4       |  12       5        129     |
|  5        8        349     |  12       6        12      |  34       7        349     |
|  13       12       234     |  9        5        7       |  12346    8        12346   |
|----------------------------+----------------------------+----------------------------|
|  178      127      278     |  47       9        23      |  12348    6        5       |
|  78       3        256789  |  47       1        56      |  248      249      248     |
|  4        1269     2569    |  23       8        56      |  7        129      123     |
|----------------------------+----------------------------+----------------------------|
|  2        5        1       |  6        4        8       |  9        3        7       |
|  9        67       3678    |  5        27       13      |  12468    124      12468   |
|  378      4        3678    |  13       27       9       |  5        12       1268    |
+--------------------------------------------------------------------------------------+


There is a Naked Quad in box 4 ... followed by a Naked Triple in row 6. You should be able to handle everything after that.

[santa]

I had to do some research to understand that and figure out what was involved but I got it in the end. whew....those triples and quads will be hard to spot in the future but now at least I have some concept...

[Pat]

Code: Select all

|  6     1279  279     |  8     3     4    |  12       5        129     |
|  5     8     349     |  12    6     12   |  34       7        349     |
|  13    12    234     |  9     5     7    |  12346    8        12346   |
|----------------------+-------------------+----------------------------|
|  178   127   278     |  47    9     23   |  12348    6        5       |
|  78    3     256789  |  47    1     56   |  248      249      248     |
|  4     1269  2569    |  23    8     56   |  7        129      123     |
|----------------------+-------------------+----------------------------|
|  2     5     1       |  6     4     8    |  9        3        7       |
|  9     67    3678    |  5     27    13   |  12468    124      12468   |
|  378   4     3678    |  13    27    9    |  5        12       1268    |



There is a Naked Quad in box 4 ... followed by a Naked Triple in row 6.

"hidden" duo {5,6} in row 5
gives a "hidden single" in that row,
then a "hidden single" in a column;

also after that duo,
the 2 for row 5 must be in box 6
-- exclude 2 elsewhere in that box,
finish with "singles".

[wintder]

"hidden" duo {5,6} in row 5
gives a "hidden single" in that row,
then a "hidden single" in a column;

also after that duo,
the 2 for row 5 must be in box 6
-- exclude 2 elsewhere in that box,
finish with "singles".

Good "spot" Pat.

I find some of the "harder" methods easier than quads and even hidden duos, at times.

The order you look for, or find, techniques makes a puzzle quite different.

Santa, there are usually several paths.

Where daj saw a quad and Pat saw a hidden pair I saw a UR.

They all advance the puzzle. "You see what you want to see..." (Harry Nilsson)

Code: Select all

|  6     1279   279     |  8     3     4    |  12       5        129     |
|  5     8      349     |  12    6     12   |  34       7        349     |
|  13    12     234     |  9     5     7    |  12346    8        12346   |
|-----------------------+-------------------+----------------------------|
|  178   127    278     |  47    9     23   |  12348    6        5       |
|  78    3    *25789-6  |  47    1    *56   |  248      249      248     |
|  4     1269 *259-6    |  23    8    *56   |  7        129      123     |
|-----------------------+-------------------+----------------------------|
|  2     5      1       |  6     4     8    |  9        3        7       |
|  9     67     3678    |  5     27    13   |  12468    124      12468   |
|  378   4      3678    |  13    27    9    |  5        12       1268    |



[santa]

I'll look that up....beginner at this...