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Web extreme sudoku posts five new puzzles every day. Each puzzle has a unique solution and can be solved with pure logic. Web very difficult sudoku puzzles. Web free hard printable sudokus! Web each puzzle page is part of a printable pdf with an answer key to help when you need a hint or two to solve the puzzle. Web extreme sudoku posts five new puzzles every day. To play online or print a puzzle, click on its image. The puzzles in this page are rated very.
