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ABCD (2) (Posted on 2008-03-07) Difficulty: 3 of 5
Place one of the four letters A, B, C or D in each of the blue-coloured cells. No letter can be horizontally or vertically adjacent to itself. The yellow-coloured tables above and to the left of the grid indicate how many times each letter appears in that column or row.

This is an extended version of ABCD.

A

3

2

0

2

2

2

0

3

1

B

2

1

3

0

0

1

3

0

2

C

1

2

1

3

2

3

1

2

1

A

B

C

D

0

1

2

1

2

0

2

1

2

2

0

4

3

4

4

1

0

3

2

2

2

3

3

2

1

1

0

4

4

2

3

3

1

No Solution Yet Submitted by Josie Faulkner    
Rating: 4.1667 (6 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
Solution Solution | Comment 4 of 20 |

Second attempt, with some brute force work!

A C D C A C D C D
B A B A C A B A B
A B D C A B C D A
B A B A D C B A C
C D C D C A D C D
A C B C D C D A B

Edited on March 8, 2008, 1:29 am
  Posted by Dej Mar on 2008-03-07 13:37:36

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