latin square
http://plus.maths.org/content/taxonomy/term/765
enAnything but square: from magic squares to Sudoku
http://plus.maths.org/content/anything-square-magic-squares-sudoku
<div class="field field-type-text field-field-author">
<div class="field-items">
<div class="field-item odd">
Hardeep Aiden </div>
</div>
</div>
<div class="field field-type-filefield field-field-abs-img">
<div class="field-items">
<div class="field-item odd">
<img class="imagefield imagefield-field_abs_img" width="100" height="100" alt="" src="http://plus.maths.org/content/sites/plus.maths.org/files/issue38/features/aiden/icon.jpg?1141171200" /> </div>
</div>
</div>
<div class="field field-type-text field-field-abs-txt">
<div class="field-items">
<div class="field-item odd">
Get on a commuter train these days and you can virtually see people's brains crunching away at filling the numbers from 1 to 9 into a square grid. As the Sudoku craze shows no sign of slowing, <b>Hardeep Aiden</b> investigates its relatives and predecessors. </div>
</div>
</div>
<div class="pub_date">March 2006</div>
<!-- plusimport -->
<br clear="all" />
<h3>What is a magic square?</h3>
<p>There is an ancient Chinese legend that goes something like this. Some three thousand years ago, a great flood happened in China. In order to calm the vexed river god, the people made an offering to the river Lo, but he could not be appeased. Each time they made an offering, a turtle would appear from the river. One day a boy noticed marks on the back of the turtle that seemed to represent the
numbers 1 to 9.<p><a href="http://plus.maths.org/content/anything-square-magic-squares-sudoku" target="_blank">read more</a></p>http://plus.maths.org/content/anything-square-magic-squares-sudoku#comments38latin squaremagic squaresudokuWed, 01 Mar 2006 00:00:00 +0000plusadmin2279 at http://plus.maths.org/content