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Classic + Palindrome
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A palindrome reads the same forwards and backwards. In this variant, mirrored positions on a line must contain the same digit.
Palindrome Sudoku adds lines where the sequence of digits must read the same in both directions. These lines create symmetry-based deductions on top of the normal Sudoku rules.
Yes. Row, column and box logic still applies, but you also need to track the mirrored relationships created by palindrome lines.
Start by identifying matching positions along each palindrome line and looking for cells that already have strong restrictions.
The lines connect cells through symmetry, allowing information to move between distant parts of the grid.