Welcome to this new video, explaining the X-Wing technique that can be used to make progress with solving sudoku puzzles.
X-Wings are normally the hardest technique you might be expected to know to solve the harder puzzles in mainstream newspapers.
The video shows an example of an X-wing, illustrating its distinctive shape in the grid, and then how the X-wing can be used to make deductions by means of removing pencilmarks from other squares in the grid.
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► [ Ссылка ] ◄
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