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About game
Zero Sum is a mathematical puzzle game with simple rules, but requires strategic thinking. The playing field consists of 3×3 cells. The goal of the game is to leave exactly one non—zero square on the field. To complicate matters, there is a mode with a 4x4 field, as well as a time-limited blitz mode.The game perfectly trains logic and mathematical abilities, offering both a calm solution to the puzzle and a gambling mode for time.
How to play
To play Zero Sum, follow the simple steps. There's a field of numbers in front of you. Click on the cell with the largest number, then on the neighboring cell with the smallest number (vertically or horizontally only). The larger number will be replaced by the difference of these numbers, and the smaller one will become zero. Repeat these steps until there is only one number left on the entire field — then you win.