How to play

  • The variables represents unique integers ranging from 1 to the number of variables;
  • Multiplication is implicit: AB means A times B, or A * B;
  • Based on the clues (equations and inequations), use the grid to create relations between variables and values:
    • Click once on a square to mark that value as false;
    • Click twice to assign the chosen value to the variable;
    • Click three times to clear the square.
  • The color of a clue changes after you assign values to all of its variables:
    • GREEN means that the statement is true;
    • RED means that the statement is false.
  • Click on a clue to mark it as used;
  • The game ends when all values are correctly assigned to the variables.

Tips

  • Figuring out which variables can't have the lowest or the highest values is a good starting point, e.g, A > B shows that A ≠ 1;
  • Analyzing the hypothetical equation C + D = 4, we can make the following statements:
  • Another quick tip: A = 2B means that A is even;
  • Don't be afraid of using pen and paper. Some puzzles might require it.

More 9x9 puzzles

  • H + I = 7
  • D + H = 3
  • A + E = 7
  • D + E + G = 15
  • F + H = 9
  • A + B + D = 10

Solve

  • C + I = G + 11
  • E = BD + B + I
  • A + 2D = H + 7
  • B + D + F = 8
  • E + 1 = 2F

Solve

  • E + H = C + 2
  • E + F = I
  • B + D + 7 = C + EG
  • C = B + F
  • E + F + G = A + B + 7

Solve

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