Divide the 10x10 square in ten different, distinct rectangles so that each one has a dot at a corner.

+---+---+---+---+---+---+---+---+---+---+
|   |   |   |   |   |   |   |   |   |   |
+---+---+---+---+---+---+---+---+---+---+
|   | O |   |   |   |   | O |   |   |   |
+---+---+---+---+---+---+---+---+---+---+
|   |   |   |   |   |   |   |   |   |   |
+---+---+---+---+---+---+---+---+---+---+
|   |   |   |   |   | O |   |   |   |   |
+---+---+---+---+---+---+---+---+---+---+
|   |   | O |   |   |   |   |   |   |   |
+---+---+---+---+---+---+---+---+---+---+
|   |   |   |   |   |   |   |   |   |   |
+---+---+---+---+---+---+---+---+---+---+
|   |   |   |   |   |   |   |   |   | O |
+---+---+---+---+---+---+---+---+---+---+
|   |   |   | O |   |   | O |   |   |   |
+---+---+---+---+---+---+---+---+---+---+
|   |   |   |   |   |   |   | O |   |   |
+---+---+---+---+---+---+---+---+---+---+
|   |   |   |   |   |   | O | O |   |   |
+---+---+---+---+---+---+---+---+---+---+

Rectangles f ang g in the following diagram are identical, so it doesn't meet the criteria of the puzzle:

+---+---+---+---+---+---+---+---+---+---+
| a | a | b | b | b | b | b | c | c | c |
+---+---+---+---+---+---+---+---+---+---+
| a | O | b | b | b | b | O | c | c | c |
+---+---+---+---+---+---+---+---+---+---+
| E | E | E | E | E | E | D | c | c | c |
+---+---+---+---+---+---+---+---+---+---+
| E | E | E | E | E | O | D | c | c | c |
+---+---+---+---+---+---+---+---+---+---+
| f | f | O | g | g | g | D | c | c | c |
+---+---+---+---+---+---+---+---+---+---+
| f | f | f | g | g | g | D | c | c | c |
+---+---+---+---+---+---+---+---+---+---+
| f | f | f | g | g | g | D | c | c | O |
+---+---+---+---+---+---+---+---+---+---+
| f | f | f | O | g | g | O | H | H | H |
+---+---+---+---+---+---+---+---+---+---+
| J | J | J | J | J | J | J | O | H | H |
+---+---+---+---+---+---+---+---+---+---+
| J | J | J | J | J | J | O | O | i | i |
+---+---+---+---+---+---+---+---+---+---+

Posted by Charlie on 2005-03-08 18:54:31