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  Topic: Need help understanding drawer's tip
squirrel

Replies: 4
Views: 41390

PostForum: Other puzzles   Posted: Wed Aug 24, 2005 9:32 pm   Subject: Need help understanding drawer's tip
Note to self: Next time, type faster. Very Happy
  Topic: Need help understanding drawer's tip
squirrel

Replies: 4
Views: 41390

PostForum: Other puzzles   Posted: Wed Aug 24, 2005 9:31 pm   Subject: Need help understanding drawer's tip
There are hidden pairs {2,5} at r5c7 and r5c9. That means a 4 must appear in either r5c1 or r5c3 and thus cannot appear in r4c2 or r6c2.

Also, since there's already a 4 in both r8 and c5, there must ...
  Topic: unsolved sudoku in our local newspaper
squirrel

Replies: 20
Views: 403530

PostForum: Daily Sudoku puzzles   Posted: Wed Aug 24, 2005 9:03 pm   Subject: unsolved sudoku in our local newspaper
There are also hidden pairs {4,5} in r3c2 and r3c3.

After finding these I went looking for forced chains of 1, 2, etc. Fortunately I never got to "etc" because 2 had only one possible solution. After ...
 
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