I can send you a scan of my 25x25 example published in their issue. Impossible through [math-fun]. Send me a direct message. Christian. -----Message d'origine----- De : math-fun-bounces+cboyer=club-internet.fr@mailman.xmission.com [mailto:math-fun-bounces+cboyer=club-internet.fr@mailman.xmission.com] De la part de Christian Boyer Envoyé : samedi 1 avril 2006 09:39 À : 'math-fun' Objet : RE: [math-fun] Pandiagonal Sudoku? If you want to see a 25x25 example, the smallest possible pandiagonal Sudoku: published in the April 2006 issue, page 70, of Mathematics Today (IMA, the Institute of Mathematics and its Applications, UK). In the same issue, the second part of the article on pandiagonal magic squares published by Dame Kathleen Ollerenshaw. Christian. -----Message d'origine----- De : math-fun-bounces+cboyer=club-internet.fr@mailman.xmission.com [mailto:math-fun-bounces+cboyer=club-internet.fr@mailman.xmission.com] De la part de Christian Boyer Envoyé : lundi 6 mars 2006 18:21 À : 'math-fun' Objet : [math-fun] Pandiagonal Sudoku? Do you know if a pandiagonal Sudoku has already been published? I have a 25x25 example, the smallest possible size for this problem, but perhaps the same work has already been done. "Pandiagonal Sudoku" means that all the diagonals and broken diagonals of the square should also contains all the numbers, as it is for rows, columns, and sub-squares. It is proved that a pandiagonal Latin square cannot exist for 2k and 3k orders, meaning that a pandiagonal Sudoku of standard size (9x9) is impossible. I know published 25x25 pandiagonal Latin squares, but they are not Sudokus, because they are not organized in 5x5 sub-squares. Christian. _______________________________________________ math-fun mailing list math-fun@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/math-fun _______________________________________________ math-fun mailing list math-fun@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/math-fun