mike | Shared With: Everyone - Oct 09 2006 | puzzles, sudokuMy sister, Catheryn, is hooked on these. Tired of vanilla Sudoku? Go Samurai Sudoku!
Quoted: Samurai sudoku puzzles consist of five overlapping sudoku grids. The standard sudoku rules apply to each 9 x 9 grid. Place digits from 1 to 9 in each empty cell. Every row, every column, and every 3 x 3 box should contain one of each digit.
redotting: Catheryn
- mike | Shared With: Everyone - May 22 2008 | sudoku, math, group theory, puzzles
There are only 5 billion essentially distinct Sudoku puzzles (solutions) (proof here using Group Theory and Burnside's Lemma).
ShareViewed: 6 Times - mike | Shared With: Everyone - May 11 2008 | sudoku, math, puzzles, programming
Interesting article on rating the difficulty of Sudoku's and various solving methods (including a short backtracking program written in Ruby).
ShareViewed: 22 Times - mike | Shared With: Everyone - Nov 19 2007 | books, puzzles, sudoku
My friend Roy's new puzzle book. You can pre-order from Amazon now.
Quoted: Amazon.com: Who-doku: Sudoku with Personality: Books: Roy Leban by Roy Leban
ShareViewed: 6 Times - mike | Shared With: Everyone - Mar 09 2006 | sudoku, puzzles, news
Quoted: Veit Elser, Cornell professor of physics, has found that an algorithm developed to process X-ray diffraction data also solves Sudoku puzzles.
ShareViewed: 19 Times - mike | Shared With: Everyone - Mar 09 2006 | sudoku, puzzles, blogs
ShareViewed: 4 Times - mike | Shared With: Everyone - Jan 20 2006 | sudoku, puzzles, algorithms
February 2006 Article (and source code) for an algorithm using bipartite graphs for Sudoku solutions.
ShareViewed: 19 Times - mike | Shared With: Everyone - Jan 20 2006 | sudoku, puzzles, algorithms
July 2005 paper describing a graph-based algorithm applicable to Sudoku puzzles.
Quoted: We apply our path and cycle finding algorithms in a program for generating and solving Sudoku puzzles, and show experimentally that they lead to effective puzzle-solving rules that may also be of interest to human Sudoku puzzle solvers.
ShareViewed: 8 Times - mike | Shared With: Everyone - Jan 20 2006 | sudoku, puzzles
Excellent article on the history and mathematics of Sudoku.
ShareViewed: 7 Times - mike | Shared With: Everyone - Dec 14 2005 | Puzzles, Sudoku
I've been thinking about explicit logic strategies for my solver - this site has some explanations I haven't seen before (X-Wing) and (Sword-Fish) - though I've used the former in manual solves.
Quoted: Sudoku Solver by Scanraid Ltd. Shows the logic behind solving Sudoku square by square.
ShareViewed: 14 Times
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