The number 7 is missing from box A7-C9 and its only possible position is cell C7. Due to other 9s on the grid, the only place it can go is cell H8. The number 9 does not yet appear in column 8. Due to other 3s on the grid, the only place it can go is cell H2. The number 3 does not yet appear in column 2. Due to other 6s on the grid, the only place it can go is cell I8. The number 6 does not yet appear in row I. Due to other 3s on the grid, the only place it can go is cell A9. The number 3 does not yet appear in row A. With our step-by-step solutions, you can be confident that your readers will enjoy solving your Sudokus with pencil and paper, and will never be frustrated by logical dead ends. Naturally each puzzle can be solved in many different ways, but every way leads to the same solution. The step-by-step shows one way to solve puzzle using only logical reasoning. Our puzzles never require "trial and error", which is easy for computers but tedious for people.Įvery Sudoku puzzle we provide comes with its step-by-step solution, such as the hard example shown below. The difficulty of a puzzle is determined by the depth of logic required. Example Sudoku - Hard Level - 27 Givens - Step-by-Step Solution - By Web SudokuĮvery Sudoku we create has a unique solution which can be reached by logic alone.
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