Clues for the sudoku puzzle

+ Advanced options:

Guess algorithm

Candidate guess order

Verify single solution

Quick Help:

  • You can use any 9 nonwhitespace characters in the sudoku.
  • All characters that appear more than 9 times are ignored.
  • All entered characters is case insensitive.
  • You can use arrow keys to navigate around the sudoku grid.
  • You can use custom solver to solve any N*N sudoku puzzle.
  • When mapping a custom sudoku puzzle, the regions do not need to be connected.