A Naked Single is a case where a cell has only 1 possible value.
The name comes from analogy with Naked Pairs, Triples etc. A Naked Pair is when two cells A and B of some group - a row, column, or box - have the same two possible values. Whichever way those 2 values are assigned to cells A and B, they are not available to fill any of the other cells, so they can be removed as possibilities from the rest of the group. The "naked" indicates there are no other possibilities but the pair. Naked Triples, Quads, etc. work similarly. By extension downward, a single cell with a single possibility is a naked single.
there is no real satistics to a sudoku so unluky the are many ways to do a sudoku
Sudoku is a noun.
Lovers of sudoku can visit the BrainBashers website where they can find daily sudoku games. Billions of free sudoku can also be found on Websudoku. This is unlimited and can be played on all devices such as android or Ipad.
Sudoku Gridmaster happened in 2006.
Buku Sudoku happened in 2006.
Zen of Sudoku was created in 2006.
Zen of Sudoku happened in 2006.
Rubik's Sudoku was created in 2006.
There are several places where one can play sudoku online. Some interactive online sudoku websites include Web Sudoku, Sudoku Saviour, and You Play. Sudoku puzzles can also be printed out and completed by hand, and these types of puzzles can also be found on these websites.
Pyramid sudoku is a regular sudoku board with shaded areas. Not only does one need to complete the regular sudoku, but the shaded areas can only have 1-9 as well.
It doesn't look as if Euler was involved with the invention of Sudoku. http://en.wikipedia.org/wiki/Sudoku#History
Sudoku (: Sudoku (: