Universal Sudoku
No digit can occupy the same position in any of the nine 3x3 boxes across the entire grid. In other words, each digit must appear in every possible position within the nine classic 3x3 boxes.
Brace yourself for the ultimate challenge – Universal Sudoku! This variant pushes both logic and vision to their limits. While classic Sudoku involves three dimensions: rows, columns, and 3x3 boxes, Universal Sudoku introduces an exhilarating fourth dimension: the entire grid.
Universal Sudoku Rule: No digit can occupy the same position in any of the 3x3 boxes across the entire grid. In other words, each digit must appear in every possible position within the nine classic 3x3 boxes.
Check out the examples in the image below.
Universal Sudoku Guidelines:
- In addition to the classic Sudoku rules, each cell in the grid “sees” all the cells occupying the same position in the other 8 boxes.
- All traditional Sudoku strategies now extend to include the cells in the same position across the other 8 boxes.
- Carefully examine the entire grid to identify potential candidates for each cell.
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