Play Nabner Sudoku Online Free

Play Nabner Sudoku online for free. No two digits on a Nabner line may be consecutive. Classic Sudoku rules apply.

▶ Play Nabner Sudoku — Free
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How to Play Nabner Sudoku

  1. Standard Sudoku rules apply.
  2. On Nabner lines, no two digits may be consecutive (differ by 1).
  3. Digits don't need to be in order — just no adjacent values anywhere on the line.
💡 Pro Tip
On a Nabner line, if 5 is placed, neither 4 nor 6 can appear anywhere on that line (not just adjacent cells).

Frequently Asked Questions

How is Nabner different from German Whispers?

German Whispers requires adjacent cells on the line to differ by 5 or more. Nabner forbids any two cells on the line — adjacent or not — from being consecutive.

Can a Nabner line have repeated digits?

Only if standard Sudoku allows it — repeats are still forbidden within a row, column, or box. The Nabner rule itself doesn't ban duplicates.

Try More Puzzle Modes

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▶ Play Nabner Sudoku