Draw on Edges: OFF Panel: OFF

     

  • Check All
  • Surface
  • Line Normal
  • Line Diagonal
  • Line Free
  • Line Middle
  • Line Helper
  • Edge Normal
  • Edge Diagonal
  • Edge Free
  • Edge Helper
  • Edge Erase
  • Wall
  • Number Normal
  • Number L
  • Number M
  • Number S
  • Candidates
  • Number 1/4
  • Number Side
  • Sudoku Normal
  • Sudoku Corner
  • Sudoku Centre
  • Shape
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  • Thermo
  • Sudoku Arrow
  • Composite

Selection: edgesub
Standard Araf rules: Divide the grid into some regions formed of edge-adjacent squares. Each cell is part of one region, and each region should contain exactly two given numbers. Each region must have an area that is strictly between those numbers (This means, for two number clues A and B with A < B, the area C fulfills A < C < B).

For automatic solution checking, either (A) all edges separating regions must be drawn in green, or (B) all cells are colored (anything except white) so that same colors mark single regions and adjacent cells between different regions are always different colors.
CTRL + z CTRL + y Erase elements that belongs to the selected mode Erase problem or solution grid

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