Easy Palindrome Sudoku

Digits along each marked line read the same forwards and backwards. Every palindrome mirrors its own logic.

Easy Medium Hard Expert

New to Palindrome Sudoku? Each grey line reads the same in both directions. Start with the shortest lines for quick wins.

2
8
1
7
9
3
4
8
2
4
9
8
2
7
9
2
7
1
3
5
4
1
7
4
9
7
2
4
3
9
1
9
8
5
3
5
7
1
Mistakes
0/3
Score
-
Time
00:00
Try Medium Palindrome Sudoku →
Progress0%

What is Palindrome Sudoku?

Difficulty
★★★☆☆
3/5
Constraint Type
Line Constraints
Typical Givens
20–28
Avg. Solve (Easy)
7 min

Solving Techniques for Easy Level

Technique Description Level
Mirror Pair Identification In a palindrome of length L, cell i and cell L+1−i must share the same digit. Identify all mirror pairs before solving. Beginner
Centre Cell Freedom The central cell of an odd-length palindrome has no mirror constraint — it is only restricted by standard row/column/box rules. Beginner

Ready to go deeper? Try Medium Palindrome Sudoku to unlock Intermediate techniques.

Techniques to Master at Easy

  • Last Remaining Cell technique — Every placement on a grey line is two placements — the mirror cell fills with the same digit, often completing a unit at the far end of the grid.
  • Last Possible Number technique — A line cell inherits all of its mirror partner's eliminations: intersect both cells' row, column, and box exclusions and many palindrome cells reduce to one digit.

Average Solve Time by Difficulty

Easy
7 min
Medium
16 min
Hard
32 min
Expert
58 min
Want a full walkthrough of rules, strategies, and solving steps? How to Play Palindrome Sudoku →

Related Variants

Renban Sudoku

Both put structure on a drawn line's digit set — renban demands a consecutive run where palindromes demand mirror symmetry.

German Whispers

Trades mirrored repetition for forced separation: adjacent line digits must differ by 5 or more.

Between Lines Sudoku

Endpoint-anchored lines where position on the line carries meaning, just as it does for palindrome mirror pairs.

Frequently Asked Questions — Easy Palindrome Sudoku

What is Palindrome Sudoku?
Palindrome Sudoku is a Sudoku variant where grey lines are drawn on the grid. Each grey line is a palindrome — the sequence of digits reads the same forward and backward. Standard Sudoku rules still apply: every row, column, and 3x3 box must contain each digit 1 through 9 exactly once.
How do palindrome lines work?
The digits along a grey line must form a palindrome. For a 5-cell line, the first cell equals the fifth, and the second cell equals the fourth. The middle cell (third) is unconstrained by the palindrome rule — but still must obey standard Sudoku uniqueness.
Can palindrome lines overlap with each other?
Yes. Two palindrome lines can share cells. A shared cell must satisfy the palindrome constraint of both lines simultaneously, which can sharply restrict what digit can go there.
How do I start solving easy Palindrome Sudoku?
Find the shortest palindrome lines first — a 2-cell line means both cells are equal, which combined with row/column uniqueness greatly limits possibilities. Also look for palindrome endpoints that share rows or columns with many given digits.
How is Palindrome Sudoku different from regular Sudoku?
Regular Sudoku gives you pre-filled digits as clues. Palindrome Sudoku typically has fewer givens and instead provides visual line constraints. The palindrome relationship between paired cells adds a second layer of constraint on top of standard uniqueness.

More questions? See the full Palindrome Sudoku guide.