🔁 Palindrome Sudoku

📖 How to play Palindrome Sudoku

1. The sudoku rules apply: 1 through 9 with no repeats in each row, column, and 3x3 box.
2. Each gray line is a palindrome: the first square equals the last, the second equals the second-to-last, and so on toward the center.
3. Tap an empty square and choose the number. Each puzzle has a unique solution.

💡 Tip: as soon as you know a number at one end of the line, you know the one at the other end too. The center square (if any) has no pair: it can be any value.