Sudoku
Sudoku is very simple to learn, it needs no calculations, and provides an amazing variety of logic situations. All that's required is brain power and concentration. Get the rules straight and try the sample problem in Puzzle Japan.Rules
1. Place a number from 1 to 9 in each empty cell.
2. Each row, column and 3x3 block bounded by bold line (nine blocks) contains
all the number from 1 to 9.
Features
Sudoku is very simple to learn, requires no calculations, and provides a surprisingly wide variety of logic situations. All that is required to solve Sudoku is brains and concentration. No wonder Sudoku is among the most popular puzzles in Japan.History
The Sudoku Puzzle is not our original puzzle. We found this puzzle in an American puzzle magazine, where it was titled "Number Place," and we introduced it to our Japanese readers at 1984. First our title for this puzzle was "Suuji wa dokushin ni kagiru." Translated it means that the number is limited to only a single (unmarried) one. But this title was too long, and it was abbreviated to "Sudoku". Here "SU" means number and "DOKU" means single.Back then, Sudoku did not become popular immediately, and in 1986 we decided on a rule for making this puzzle: that clues must be arranged in a symmetrical pattern. After our improvement, the puzzle became a big hit.