HOW TO PLAY:
Fill the empty squares in the grid below with the numbers 1-9 so that each column and 3x3 grid contain each number only once. The far right column ("sum column") must equal the the singles digit from the sum of that row.
Example: 8 + 5 + 2 = 15, so a 5 would placed in the sum column.
Click on a cell to add or remove numbers for that cell,
← ↑ ↓ → W, A, S, D and numbers supported.