247 Sudoku Strategy. Every row, column, and 3x3 box contains the digits 1 to 9 only once on the sudoku board! Sudoku has many difficulties, all offered on 24/7 Sudoku! Use logic to solve this fun sudoku puzzle! Find 24/7 Sudoku on all your devices -- including your computer, phone, and tablet!
Play medium Sudoku puzzles online on Sudoku.com. Our daily medium difficulty web sudoku puzzles are suitable for people, who possess basic knowledge of game and can quickly deal with easy level Sudoku.
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Play hard level Sudoku online on Sudoku.com. Our daily difficult web sudoku puzzles are suitable for people, who possess an excellent knowledge of sudoku game and know how to build a proper strategy to get a right solution in short terms.
Each Sudoku has a unique solution that can be reached logically without guessing. Enter digits from 1 to 9 into the blank spaces. Every row must contain one of each digit. So must every column, as must every 3x3 square. Play Offline with Web Sudoku Deluxe. Download for Windows or Mac OS X. Print a Customized Sudoku Ebook
To complete the Sudoku puzzle, enter numbers into the spaces so that each row, column and 3×3 box contains the digits 1 to 9 without repeats. Some tips for solving Sudoku: Avoid trial and error – find a logical reason for entering each number. Look for rows, columns and 3×3 boxes with just a few blanks remaining.
In each Sudoku puzzle you have a 9x9 grid, divided into nine 3x3 square regions (you can just look above to get an impression). So each row, column or region contains nine cells. You start a Sudoku puzzle with some cells already filled in with numbers. You can't change these numbers. The more cells are pre-filled the easier the puzzle.
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Sudoku is a logic-based, combinatorial number-placement puzzle. The puzzle setter provides a partially completed grid, which for a well-posed puzzle has a single solution. wikipedia.org
- In classic Sudoku, the objective is to fill a 9 × 9 grid with digits so that each column, each row, and each of the nine 3 × 3 subgrids that compose the grid (also called "boxes", "blocks", or "regions") contain all of the digits from 1 to 9.
- The modern Sudoku was most likely designed anonymously by Howard Garns a 74-year-old retired architect and freelance puzzle constructor from Connersville, Indiana, and first published in 1979 by Dell Magazines as Number Place (the earliest known examples of modern Sudoku).
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