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 Four Squared (Posted on 2006-10-26)
```        Grid A                    Grid B
A   B   C   D             A   B   C   D
+---+---+---+---+         +---+---+---+---+
1  |   |   |   |   |      1  |14 |23 |34 |14 |
+---+---+---+---+         +---+---+---+---+
2  |   |   |   |   |      2  |31 |42 |26 |26 |
+---+---+---+---+         +---+---+---+---+
3  |   |   |   |   |      3  |22 |24 |44 |29 |
+---+---+---+---+         +---+---+---+---+
4  |   |   |   |   |      4  |12 |32 |19 |16 |
+---+---+---+---+         +---+---+---+---+
```
The numbers 1 to 16 are to be placed in grid A, so that consecutive numbers are not adjacent in any direction, including diagonally. Nor do they appear in the same row, column or any diagonal.

The number in each cell of grid B is the sum of the horizontal and vertical neighbors of the corresponding cell in grid A.

NB. The letters and numbers around the edge of the grid serve no purpose for the solver. They are to be used for identifying cells in the solution.

 See The Solution Submitted by Josie Faulkner Rating: 4.4167 (12 votes)

 Subject Author Date re: Solution Josie Faulkner 2006-11-03 18:54:26 Solution nikki 2006-11-03 15:50:16 re: Detailed Solution Josie Faulkner 2006-10-31 05:09:45 Detailed Solution rs 2006-10-31 04:44:53 re: Solution: Took a looong time :( Josie Faulkner 2006-10-31 04:08:27 Solution: Took a looong time :( rs 2006-10-31 03:44:46 RE: Solution Guest 2006-10-27 19:30:06 Solution Guest 2006-10-27 19:25:21 re(3): computer solution Josie Faulkner 2006-10-27 10:31:19 re(2): computer solution Charlie 2006-10-27 09:22:36 re(2): No Subject Josie Faulkner 2006-10-27 05:45:21 re: computer solution Josie Faulkner 2006-10-26 17:42:44 re: A trivial way to solve this Josie Faulkner 2006-10-26 17:36:13 re: No Subject Josie Faulkner 2006-10-26 16:58:18 computer solution Charlie 2006-10-26 16:11:07 No Subject BRYN 2006-10-26 15:37:08 A trivial way to solve this Old Original Oskar! 2006-10-26 14:18:36

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