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 A domino puzzle (Posted on 2008-08-15)
Arrange the 28 pieces of a standard domino (0-0 to 6-6) in the board shown, so that equal spot numbers occur in groups of four, forming squares. Fourteen squares should result, each containing four equal spot numbers.
```            +---+---+       +---+---+
|   |   |       |   |   |
+---+---+---+---+---+---+---+---+
|   |   |   |   |   |   |   |   |
+---+---+---+---+---+---+---+---+
|   |   |   |   |   |   |   |   |
+---+---+---+---+---+---+---+---+
|   |   |   |   |   |   |   |   |
+---+---+---+---+---+---+---+---+
|   |   |   |   |   |   |   |   |
+---+---+---+---+---+---+---+---+
|   |   |   |   |   |   |   |   |
+---+---+---+---+---+---+---+---+
|   |   |   |   |   |   |   |   |
+---+---+---+---+---+---+---+---+
|   |   |       |   |   |
+---+---+       +---+---+```

 See The Solution Submitted by pcbouhid Rating: 3.0000 (1 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
 re: Pencil and paper solution. | Comment 2 of 3 |
(In reply to Pencil and paper solution. by Charlie)

There are bold horizontal lines in the diagram to delineate the dominoes in the previous post, but they don't look bold.

So:

`            +---+---+       +---+---+            | 0   0 |       | 2   2 |            +---+---+---+---+---+---+---+---+            | 0 | 0   4 | 4   2 | 2   6 | 6 |            +   +---+---+---+---+---+---+   +            | 5 | 5   4 | 4   1 | 1   6 | 6 |            +---+---+---+---+---+---+---+---+            | 5 | 5   3 | 3   1 | 1   5 | 5 |            +   +---+---+---+---+---+---+   +            | 2 | 2   3 | 3   6 | 6   5 | 5 |            +---+---+---+---+---+---+---+---+            | 2 | 2   0 | 0   6 | 6   4 | 4 |            +   +---+---+---+---+---+---+   +            | 1 | 1   0 | 0   3 | 3   4 | 4 |            +---+---+---+---+---+---+---+---+            | 1   1 |       | 3   3 |            +---+---+       +---+---+`

 Posted by Charlie on 2008-08-15 12:22:27

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