![]() PRINT: You can print the puzzle in PDF format, which requires the free Acrobat Reader. ![]() The square indicated by the hint, click "Reveal." The object of Sudoku is to fill in the empty spaces of a 9x9 grid with numbers 1-9 in such a manner that every row, every column and every 3x3 box contains all numbers 1 through 9. HINT: To find out where the next solvable square is, without being told the answer, click "Hint." Printable Sudoku Puzzles (Deluxe Version) Generate unlimited free Sudoku puzzles with varying degrees of difficulty Sudoku is a great activity to sharpen the mind. ![]() To remove all wrong answers at once after checking, hit the delete key.Īll numbers not yet used in the row, column, or box. Shift-delete removes all light numbers, shift-insert makes them dark.ĬHECK: To see how you're doing, click "Check." Boxes with incorrect answers will be highlighted in pink. These sudoku are great exercises for kids in grade school who are. These medium difficulty sudoku puzzles will get you ready for the harder puzzles typically found in newspapers or magazines. Click "Pencil" to insert numbers in light blue, and click again to return to the standard color. As with all the sudoky puzzles on the site, each page of puzzles is within a printable PDF with an answer key to help when you need a hint or two to solve. PENCIL: If you're not sure about an answer, UNDO: Click to remove the last number you entered, and the one before, and the one before. TIMER: Track your time by clicking "Start." Hold the Alt key on a PC or the Control key on a Mac while typing the numbers. If you have narrowed down the possible numbers for a box, enter multiple numbers in small type. Type a number directly into a square or drag it in from the right. Fill the grid with numbers so that every row, every column and every 3-by-3 box contains the digits 1 to 9, without repeating. For information on how to play, please see below. Overlap Strategy: Focus on areas where cages overlap with rows, columns, or squares to find numbers that fit both the cage sum and Sudoku rules.Every day on you can solve a new sudoku puzzle that matches your level of expertise.Identify these opportunities to make confident placements. Look for Exclusivity: Sometimes, a number or a sum may only be possible in one specific cage or cell.If a cage must sum to a certain number, consider which combinations of numbers can achieve that sum and use that to narrow down possibilities. Consider the Sums: Use the sums to your advantage.Use Elimination: If a number appears in a row, column, or small square, eliminate it as a possibility from other cages intersecting with that area.Start with Certainties: Begin by filling in numbers that are certain, usually starting with cages that have the smallest sums or the fewest cells.Some cells may not be part of any cage, and in such cases, only the standard Sudoku rules apply to them.Numbers within a cage must also be unique.The numbers within each cage must add up to the given sum. Cells are grouped into cages, each with a specified sum.Each row, column, and 3x3 square must contain the numbers 1 through 9, without repetition.The grid is a 9x9 square divided into smaller squares (3x3), just like classic Sudoku.In addition to adhering to the traditional Sudoku rules, it introduces a new layer of complexity by grouping cells into small areas, each labeled with a number that represents the sum of the numbers within that area. Killer Sudoku, also known by various other names such as "Sums Sudoku", "Sums Number Place", "Samunamupure", or "Kikagaku Nampure", is a variant of the classic Sudoku puzzle.
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