Christian, Yes, a spreadsheet with all solutions is near the bottom of my column. --Ed Pegg Jr --- Christian Boyer <cboyer@club-internet.fr> wrote:
Jean-Paul Delahaye publishes in the new issue of Pour La Science a very interesting article on Sudokus. He asked a very strange Sudoku problem WITHOUT any given numbers, only ">" and "<" signs between cells. He mentions that this problem was published in Puzzler, 1999, and that he does not know the solution.
I have the solution, sent this morning to J.-P. Delahaye.
Now looking for "Puzzler 1999" on Google, I find that Ed Pegg Jr. wrote an article in September 2005 including the same astonishing puzzle, figure 7 "Greater Than Sudoku" in:
http://www.maa.org/editorial/mathgames/mathgames_09_05_05.html
Perhaps that somebody else had already the solution? Ed, did you receive a solution to your article?
Christian.
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