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 8x8 puzzles

  • F + H ≤ 3
  • D + H ≤ 8
  • D + F = E
  • B + G ≤ 13
  • B + D ≤ 12
  • B + F ≤ 5
  • A + E ≤ 10
  • B + C ≤ 9

Solve

  • C + G + H = 17
  • C + G = 14
  • A + E + G = 13
  • C + F = 11
  • C + D + E = 9

Solve

  • B + F = 10
  • B + D + H = 15
  • B + E = 7
  • B + C + E = 11
  • E + G = 8
  • B + D = 9

Solve