Jasper schreef: > Not that I've played it much, but Su Doku seems to be the flavour of > the week here in London, and looks like a likely candidate for a > competition.
Alas, it's been done: http://www.ecclestoad.co.uk/blog/2005/06/02/sudoku_solver_in_three_lines_explained.html However, that solution has a very strange format for the input and the solutions, and it is very slow for puzzles such as: 2**67**** **6***2*1 4*****8** 5****93** *3*****5* **2*****7 3*1*****4 7*8***6** ****53**8 I have written a solver that returns all 299 solutions to this puzzle in just under 4 seconds. And it weighs in at just 448 characters. I'm quite sure it can be shortened by using some of the tricks from the three-line solution. Eugene
