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.
- mike | Shared With: Everyone - 30 days ago | puzzles, paint by numbers, logic
Interesting logic "tricks" for solving paint by numbers that are not amenable to "line solving" only.
ShareViewed: 2 Times - mike | Shared With: Everyone - Jan 05 2009 | puzzles, cards
An inventive collection of word-based puzzles printed on high quality cards (front and back). Each puzzle takes from 5 to 15 minutes to solve.
Quoted: Amazon.com: Genius Deck Word Puzzles (Genius Decks): Chronicle Books: Books
ShareViewed: 1 Time - mike | Shared With: Everyone - Oct 13 2008 | google, appengine, puzzazz, puzzles
Roy's Puzzazz application got mentioned on the AppEngine blog. Very cool!
ShareViewed: 3 Times - mike | Shared With: Everyone - Oct 03 2008 | seattle, teachstreet, puzzazz, appengine, google, puzzles
Two surprises-
Dave Schappell (Teach Street) authors a "reader blog" at the Seattle PI).
He covered Roy Leban's Puzzazz web site (started at the Google AppEngine Hack-a-thon this summer).
ShareViewed: 12 Times - mike | Shared With: Everyone - Sep 29 2008 | puzzles, daily, roy leban
Roy's new puzzle-a-day site.
Quoted: Puzzazz provides a quick, fun puzzle of the day each and every day. Invite your friends for friendly competition. Whether you're a casual puzzler or a serious puzzle addict, Puzzazz can fill the bill.
ShareViewed: 12 Times - mike | Shared With: Everyone - Sep 11 2008 | pageforest, sample, javascript, web development, puzzles, games
Zach's greatly improved the look of this sample app - and now the Save dialog comes up when you try to create a save (you need to fill in username, password, and email address to create an account).
ShareViewed: 24 Times - mike | Shared With: Everyone - Jul 01 2008 | books, puzzles, crosswords, roy leban
Roy Leban did puzzle #16 in this crossword collection from the New York Times.
Quoted: Amazon.com: The New York Times Will Shortz Presents I Love Crosswords: From the Pages of The New York Times (Will Shortz Presents...): The New York Times, Will Shortz: Books
ShareViewed: 1 Time - 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: 20 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: 56 Times - mike | Shared With: Everyone - May 10 2008 | math, puzzles
Really interesting problem in recreational mathematics - try to reverse a unit line segment via translations/rotations - but in doing so sweep out a minimal area.
PI/4 is the obvious minimum - but it turns out you can do so in an arbitrarily small area.
What's odd to me, is that any combinations of moves that are either a) rotations about the center and b) translations, CAN NOT achieve an area less than PI/4; so it's counter-intuitive that you can do better than that.
ShareViewed: 5 Times
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