Sudoku: Perbezaan antara semakan
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== Rujukan ==
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* [http://www.nikoli.co.jp/puzzles/1/index_text-e.htm Rules and history from the Nikoli website] {{Webarchive|url=https://web.archive.org/web/20060613025508/http://nikoli.co.jp/puzzles/1/index_text-e.htm |date=2006-06-13 }}
* [http://www.puzzle.jp/keys/sudoku_keys-e.html Keys to Solution at Puzzle Japan]
* [http://www.pro.or.jp/~fuji/sudoku/makesudoku/sudoku01.html.en Let's Make Sudoku!] – Explains step-by-step how to make ''Sudoku'' puzzles by hand.
* [
* [http://www.phil.uu.nl/~oostrom/cki20/02-03/japansepuzzles/ASP.pdf Complexity and Completeness of Finding Another Solution and its Application to Puzzles] {{Webarchive|url=https://web.archive.org/web/20060716101717/http://www.phil.uu.nl/%7Eoostrom/cki20/02-03/japansepuzzles/ASP.pdf |date=2006-07-16 }} Mathematical reference proving NP-completeness.
* [http://www.shef.ac.uk/~pm1afj/sudoku/ Frazer Jarvis's Sudoku page] Contains programs, data, an article with Bertram Felgenhauer detailing the enumeration of ''Sudoku'' grids, and the results of Ed Russell.
* [http://www.sudoku.org.uk/PDF/Solving_Sudoku.pdf A step-by-step guide to Sudoku by Michael Mepham.]
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