Palindrome Sudoku

Digits on each Palindrome line have to be in a symmetrical order, i.e. on a palindrome line, in the length of 5 cells, the following can be a valid sequence: ‘53835’. Color: Light Blue.

Palindrome is a challenging variant. It has lines in various shapes on the board.

Palindrome rule: digits in equal distance from each end of a line must be equal. See image below for legal and illegal palindrome sequences.

Palindrome

Palindrome Tips

  1. When you find a digit on a line, enter the same digit in the cell equidistant from the other end of the line.
  2. When you remove a digit as an optional solution to a cell on a palindrome line, remove it also from the cell equidistant from the other end of the line.
  3. When a palindrome line is long, highlighting the cell(s) in the middle of the line helps locate cells equidistant from the ends of the line.

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