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String of letters (Posted on 2005-10-06) Difficulty: 3 of 5
The 25 cells below are connected so that are formed 5 strings of 5 cells. In each string you can read the letters A, B and C in this order (disregarding the empty cells in the string), and more, in the whole grid each letter appears in every row and in every column once, and only once.
             +---+ +---+ +---+ +---+ +---+
             | A |-|   | | B |-| C |-|   |
             +---+ +---+ +---+ +---+ +---+
               |           |
             +---+ +---+ +---+ +---+ +---+
             | B | | A |-|   | |   | | C | 
             +---+ +---+ +---+ +---+ +---+
               |                 |     |
             +---+ +---+ +---+ +---+ +---+
             |   |-| C | |   | | A | | B |
             +---+ +---+ +---+ +---+ +---+
                           |     |     | 
             +---+ +---+ +---+ +---+ +---+
             |   |-|   | | C |-| B | | A | 
             +---+ +---+ +---+ +---+ +---+
               |     |                 |
             +---+ +---+ +---+ +---+ +---+
             | C | | B |-| A | |   |-|   | 
             +---+ +---+ +---+ +---+ +---+
Fill the 7 x 7 grid below the same way (there are 7 strings, each one with 7 cells), using the letters A, B, C and D. One letter (D) is already placed.
 
       +---+ +---+ +---+ +---+ +---+ +---+ +---+
       |   |-|   |-|   |-|   |-|   | |   |-| D | 
       +---+ +---+ +---+ +---+ +---+ +---+ +---+
         |                       |     |     |  
       +---+ +---+ +---+ +---+ +---+ +---+ +---+
       |   | |   | |   |-|   | |   | |   | |   |
       +---+ +---+ +---+ +---+ +---+ +---+ +---+
               |     |     |           |     |
       +---+ +---+ +---+ +---+ +---+ +---+ +---+
       |   |-|   | |   | |   |-|   | |   | |   | 
       +---+ +---+ +---+ +---+ +---+ +---+ +---+
         |           |                 |
       +---+ +---+ +---+ +---+ +---+ +---+ +---+
       |   | |   | |   | |   |-|   | |   | |   | 
       +---+ +---+ +---+ +---+ +---+ +---+ +---+
         |     |     |           |           |
       +---+ +---+ +---+ +---+ +---+ +---+ +---+
       |   |-|   | |   | |   | |   | |   |-|   |
       +---+ +---+ +---+ +---+ +---+ +---+ +---+
                           |     |     |
       +---+ +---+ +---+ +---+ +---+ +---+ +---+
       |   | |   |-|   |-|   | |   | |   |-|   | 
       +---+ +---+ +---+ +---+ +---+ +---+ +---+
         |     |                 |           | 
       +---+ +---+ +---+ +---+ +---+ +---+ +---+
       |   |-|   | |   |-|   |-|   | |   |-|   | 
       +---+ +---+ +---+ +---+ +---+ +---+ +---+

See The Solution Submitted by pcbouhid    
Rating: 4.0000 (1 votes)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
No SubjectMorgan2005-11-18 16:56:04
re: Another way to visualize this puzzle.pcbouhid2005-10-09 20:36:52
Hints/TipsAnother way to visualize this puzzle.Ken Haley2005-10-09 05:47:29
The seven stringspcbouhid2005-10-07 01:35:44
re: No Subject - to Kylepcbouhid2005-10-07 01:01:21
No SubjectKyle Winking2005-10-07 00:05:26
re: No Subjectpcbouhid2005-10-06 19:17:09
re: No SubjectCory Taylor2005-10-06 19:10:41
No Subjectgoeshg2005-10-06 18:06:44
re(2): I THINK I GOT THE ANSWERpcbouhid2005-10-06 17:29:30
re: I THINK I GOT THE ANSWERpcbouhid2005-10-06 17:26:05
I THINK I GOT THE ANSWERgoeshg2005-10-06 17:08:38
I think...pcbouhid2005-10-06 17:04:28
Solutionre: SolutionKen Haley2005-10-06 05:00:39
SolutionMandy2005-10-06 04:19:36
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