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feb 18 classic

 
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mark dallas
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PostPosted: Sat Feb 18, 2006 6:47 pm    Post subject: feb 18 classic Reply with quote

126 3 8 7 12 9 126 5 4
1259 159 25 1234 6 12458 7 1238 129
7 569 4 123 1235 1258 12369 1238 1269
245 1 256 9 8 7 26 24 3
234 467 9 12346 123 1246 8 1247 5
8 467 2367 5 123 1246 126 9 1267
3469 4679 367 126 1279 126 5 1237 8
3569 8 1 26 4 256 239 237 279
59 2 57 8 1579 3 4 6 178
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TKiel
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PostPosted: Sat Feb 18, 2006 7:04 pm    Post subject: Reply with quote

You've got either a hidden pair or a naked triple in box 8. After that it's just singles.
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alanr555



Joined: 01 Aug 2005
Posts: 194
Location: Bideford Devon EX39

PostPosted: Tue Feb 21, 2006 2:11 am    Post subject: Re: feb 18 classic Reply with quote

Code:

126       3      8       7         12         9           126          5           4
1259    159   25     1234      6       12458        7          1238      129
  7       569    4      123     1235     1258       12369      1238      1269
245       1     256     9         8           7            26          24          3
234      467     9     12346  123      1246          8          1247        5
  8        467  2367    5        123     1246         126         9          1267
3469    4679  367    126     1279     126          5           1237       8
3569      8      1        26       4         256          239         237       279
59         2      57       8       1579      3              4            6          178

++

Using Mandatory Pairs the grid reduced to the following (shewn after
the then necessary reversion to Candidate Profiles and without the
Mandatory Pair marks themselves being shewn).

Few of the rows or columns yielded congruent subsets. Those that
did were:

(12)(79) in col 5.
(126)(39) in col 7.
(12)(4679) in row 7

Solution was then progressed using the candidates - although the
already identified pairs proved useful in a a few cases.

+++
126    3     8      | 7        12     9      |126     5       4
19     5     2      |134      6      148   |7         138    9
  7     69    4      |123      5     128   |12369  1238  269
245    1     256   |9         8      7      |26       24      3
234    467  9      |12346  123  1246 | 8        1247   5
  8     467  2367 |5         123  1246 |126      9        267
3469  4679 367  |126     79    126   |5         237     8
369    8      1     |26       4      5       |239     237     279
59      2      57   |8        79     3       |4         6        1

Alan Rayner  BS23 2QT
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