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Sudoku Exchange

Sudoku Exchange

  • Puzzle
  • Sudoku
  • Logic
  • Classic Puzzles
  • PC recommended

About this game

Solve classic Sudoku with candidate notes, highlighting and undo. Choose from 12 starter puzzles. Every row, column and three-by-three box must contain one through nine. Step-by-step solving hints are not available.

How to play

Choose a puzzle, select a cell and enter a digit with the keyboard or number pad. Use note mode for candidates and undo to revise moves.

Before leaving, check the game menu for a save option.

Before you play

Start with rows, columns or boxes that have few empty cells. Eliminate candidates using all three constraints rather than guessing from one row alone. Notes are a planning aid; the puzzle is solved by filling valid digits, not by filling every note slot.

Creator: Grant McLean

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