perplexus.info :: Logic : String of letters

String of letters (Posted on 2005-10-06)

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 | 
       +---+ +---+ +---+ +---+ +---+ +---+ +---+
         |                       |     |     |  
       +---+ +---+ +---+ +---+ +---+ +---+ +---+
       |   | |   | |   |-|   | |   | |   | |   |
       +---+ +---+ +---+ +---+ +---+ +---+ +---+
               |     |     |           |     |
       +---+ +---+ +---+ +---+ +---+ +---+ +---+
       |   |-|   | |   | |   |-|   | |   | |   | 
       +---+ +---+ +---+ +---+ +---+ +---+ +---+
         |           |                 |
       +---+ +---+ +---+ +---+ +---+ +---+ +---+
       |   | |   | |   | |   |-|   | |   | |   | 
       +---+ +---+ +---+ +---+ +---+ +---+ +---+
         |     |     |           |           |
       +---+ +---+ +---+ +---+ +---+ +---+ +---+
       |   |-|   | |   | |   | |   | |   |-|   |
       +---+ +---+ +---+ +---+ +---+ +---+ +---+
                           |     |     |
       +---+ +---+ +---+ +---+ +---+ +---+ +---+
       |   | |   |-|   |-|   | |   | |   |-|   | 
       +---+ +---+ +---+ +---+ +---+ +---+ +---+
         |     |                 |           | 
       +---+ +---+ +---+ +---+ +---+ +---+ +---+
       |   |-|   | |   |-|   |-|   | |   |-|   | 
       +---+ +---+ +---+ +---+ +---+ +---+ +---+

Submitted by pcbouhid

Rating: 4.0000 (1 votes)

Solution: (Hide)

+---+ +---+ +---+ +---+ +---+ +---+ +---+ | |-| |-| C |-| B |-| A | | |-| D | +---+ +---+ +---+ +---+ +---+ +---+ +---+ | | | | +---+ +---+ +---+ +---+ +---+ +---+ +---+ | D | | A | | B |-| | | | | C | | | +---+ +---+ +---+ +---+ +---+ +---+ +---+ | | | | | +---+ +---+ +---+ +---+ +---+ +---+ +---+ | |-| | | A | | C |-| D | | B | | | +---+ +---+ +---+ +---+ +---+ +---+ +---+ | | | +---+ +---+ +---+ +---+ +---+ +---+ +---+ | B | | | | | | D |-| C | | A | | | +---+ +---+ +---+ +---+ +---+ +---+ +---+ | | | | | +---+ +---+ +---+ +---+ +---+ +---+ +---+ | C |-| D | | | | | | B | | |-| A | +---+ +---+ +---+ +---+ +---+ +---+ +---+ | | | +---+ +---+ +---+ +---+ +---+ +---+ +---+ | A | | C |-| D |-| | | | | |-| B | +---+ +---+ +---+ +---+ +---+ +---+ +---+ | | | | +---+ +---+ +---+ +---+ +---+ +---+ +---+ | |-| B | | |-| A |-| | | D |-| C | +---+ +---+ +---+ +---+ +---+ +---+ +---+

Comments: ( You must be logged in to post comments.)

Subject	Author	Date
No Subject	Morgan	2005-11-18 16:56:04
re: Another way to visualize this puzzle.	pcbouhid	2005-10-09 20:36:52
Another way to visualize this puzzle.	Ken Haley	2005-10-09 05:47:29
The seven strings	pcbouhid	2005-10-07 01:35:44
re: No Subject - to Kyle	pcbouhid	2005-10-07 01:01:21
No Subject	Kyle Winking	2005-10-07 00:05:26
re: No Subject	pcbouhid	2005-10-06 19:17:09
re: No Subject	Cory Taylor	2005-10-06 19:10:41
No Subject	goeshg	2005-10-06 18:06:44
re(2): I THINK I GOT THE ANSWER	pcbouhid	2005-10-06 17:29:30
re: I THINK I GOT THE ANSWER	pcbouhid	2005-10-06 17:26:05
I THINK I GOT THE ANSWER	goeshg	2005-10-06 17:08:38
I think...	pcbouhid	2005-10-06 17:04:28
re: Solution	Ken Haley	2005-10-06 05:00:39
Solution	Mandy	2005-10-06 04:19:36

Please log in:

Login:
Password:
Remember me:

Sign up! \| Forgot password

Search:

Search body:

Forums (1)
Newest Problems
Random Problem
FAQ | About This Site
Site Statistics
New Comments (6)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On

Chatterbox:


perplexus dot info