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 7x7 puzzles

  • C + D + F = 10
  • F + G = 11
  • A + C + F = 9
  • E + G = 8

Solve

  • A + F = 10
  • B + G = 10
  • B + C = 7
  • B + F = 9
  • A + C + E = 10

Solve

  • if C < 5 then A > 7
  • if A + E ≤ 12 then D ≤ 4
  • if A ≤ 4 then E + F ≤ 9
  • if G ≥ 4 then C < 5
  • if F < 4 then E ≤ 5
  • if G ≤ 2 then D ≠ 1
  • if C + D ≤ 10 then A + F ≤ 4
  • if C ≠ 4 then A ≥ 2
  • if G ≥ 1 then F ≤ 2
  • if E + F ≤ 11 then A < 3
  • if A + G ≤ 7 then B ≠ 6

Solve