SCIENCE IN THE NEWS DAILY
Mathematician Claims Breakthrough in Sudoku Puzzle
from Nature News
An Irish mathematician has used a complex algorithm and millions of hours of supercomputing time to solve an important open problem in the mathematics of Sudoku, the game popularized in Japan that involves filling in a 9X9 grid of squares with the numbers 1-9 according to certain rules.
Gary McGuire of University College Dublin shows in a proof posted online on 1 January that the minimum number of clues--or starting digits--needed to complete a puzzle is 17; puzzles with 16 or fewer clues do not have a unique solution. Most newspaper puzzles have around 25 clues, with the difficulty of the puzzle decreasing as more clues are given.
The emerging consensus among mathematicians at a conference in Boston, Massachusetts, on 7 January was that McGuire's proof is probably valid and an important advance in the growing field of Sudoku maths.
Connect With Us:
Slideshow: Fire’s Weird Behavior in Space
In the microgravity environment of outer space, flames burn very differently than they do on Earth... (click the link above to read more).
To view all multimedia content, click "Latest Multimedia."
Receive notification when new content is posted from the entire website, or choose from the customized feeds available.