The goal of Calcle is to guess the numbers in the equation that equals the result to the right in 5 attempts or less.

Each row is an attempt. Press enter or the = button to submit, to correct a mistake press backspace or the DEL button.

After each attempt, the colour of the tiles will change to show how close your guess was:

2 × 4 + 5 + 3 − 1

The number 2 is in the equation and in the right spot.

2 × 4 + 5 + 3 − 1

The number 4 is in the equation but not in the right spot.

2 × 4 + 5 + 3 − 1

The number 5 is not in the equation at all.