|
Sudoku is a logic-based number placement puzzle. It was invented in the U.S. in 1979 under the name "Number Place", and became popular in Japan in 1986, where it was dubbed Sudoku ("single number"). It then spread internationally in 2005. The objective is to fill a 9x9 grid so that each column, each row, and each of the nine 3x3 boxes (also called blocks or regions) contains the digits from 1 to 9. The puzzle creator provides a partially completed grid, and the player has to figure out the rest. Web Sudoku allows you to play with the puzzles online with your browser, rather than having to buy printed books of puzzles. And don't worry about running out of puzzles: based on the rules set forth, there are 6,670,903,752,021,072,936,960 possible puzzle grids. From This is True for 16 September 2007 Suggestions for further reading:
 by Zachary Pitkow Amazon Price: $6.95 Customer Review: It came in a very timely manner in an adorable size; I really like how it has binding instead of being sown like a normal book. I'm not sure how difficult the puzzles are because it was a present. The only other thing I would remark on is how the sh...  Amazon Price: $10.17 Customer Review: My husband really likes it after following the advice of a previous reviewer; he cut off the part of the binding that covers the spirals, and now it lays flat and can also be folded. Perfect size for traveling, especially on planes.  by Will Shortz Amazon Price: $7.99 Customer Review: This collection of Sudoku puzzles is just what we were looking for. Most other books contain many that are too easy. These are just hard enough to make us think while still being solvable.  by Nathan Haselbauer Amazon Price: $10.04 Customer Review: I got this for my younger son who has been working at it diligently. It's great to see him do something for his brain instead of only vegetating in front of the tv or computer.  by Frank Longo Amazon Price: $7.95 Customer Review: Definitely Nasty! I would have liked a section included in the book for teaching the techniques that are required to work these puzzles. Intermediate level strategies just won't be enough. Newsfeed display by CaRP |
About the Site
About This is True About the Authors Subscribe Free to This is True and see the Sites when they're issued!
Prev: Willard Wigan's Home Page | |