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The Academy lesson explains the rule of Clone Sudoku with practical examples.
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Start by identifying the clone regions and matching their corresponding cells. Then look for the side of the pattern that has stronger restrictions.
The marked regions must repeat the same digit pattern, so the relationship between cells can be just as important as the local grid logic.
Notes are useful for tracking matching positions across clone regions, especially when the linked areas are far apart.
Clone Sudoku links marked regions that must contain the same digit pattern. This means progress in one part of the grid can create restrictions elsewhere.
Yes. Row, column and box logic still applies, but you also need to track the matching patterns between clone regions.