Objective / Rules - Complete the grid using all of the digits 1 to 9. - When completed all of the sums must be correct. - The sums are solved strictly left to right, up to down. - The normal order of mathematical operations is ignored. - For example 2 + 5 x 9 is calculated as (2 + 5) x 9 = 63. - There are no ÷ 1 in the puzzle. - There are no x 1 in the puzzle (although there might be 1 x). - At no point will any calculation go below zero, or fractional.
Keyboard Usage Entering more than one digit will reduce the font size, this allows you to enter multiple numbers, or your own code to help solve the puzzle.
Checking If you click 'Check' the system will check for incorrect squares. If 'Show mistakes when checking' is checked they will be marked in red.
Uniqueness Each puzzle has exactly one solution. If you think you've found another solution, then please double check the rules.