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  document.write("<tr><td bgcolor=#FFFFFF><h4><a href='http://en.wikipedia.org/wiki/Mathematics_of_Sudoku' target='_blank'>Wiki: The Mathematics of Sudoku</a></h4></td></tr>");
  document.write("<tr><td><div align=justify style='font-size:9pt;font-family:tahoma;padding-bottom:3px;'><p>The study of the mathematics of Sudoku has followed the increased popularity of the puzzles. Numerous mathematical articles and even books have been written to explore the mathematics behind creating and solving Sudoku puzzles, and determining the constraints for the minimum number of clues possible for solvable puzzles. </p></div></td></tr>");
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