Logic Masters Deutschland e.V.

• Normal sudoku rules apply.
• Nurikabe:
  • Shade some cells such that all shaded cells are orthogonally connected and no 2x2 area is fully shaded. Cells marked with circles can be either shaded or unshaded.
  • A shaded cell with a circle has a digit equal to the count of shaded cells seen in its row and column, including itself. Unshaded cells block sight.
  • Each orthogonally connected group of unshaded cells contains exactly one circle and the digit on it is the number of cells in that group.
• A pairrow (pair of arrows) on a cell with a digit D points to two cells D steps away in the direction of the arrows and, depending if the cell is shaded or not, the digits on those cells follow the corresponding rules:
  • If the pairrow cell is shaded, the difference of the digits is equal to D.
  • If the pairrow cell is unshaded, the sum of the digits is equal to D.

Online in Sudokupad

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