FlipSum - A Puzzle By Claris Richter is a free number-based puzzle game. Players work on a grid where each row and column displays the total sum. You must decide whether each number in every cell is positive or negative. You can also cross out one number per column and row, so it’s excluded from the calculation.

Brain-teasing puzzles

If you like Sudoku or any math-based challenges, you’ll find FlipSum - A Puzzle By Claris Richter worth playing. It comes with infinite puzzles, so you’ll never run out of challenges. The game is entirely pressure-free—there’s no timer pushing you forward.

Relaxing background music also makes it a calming experience despite the math-heavy gameplay. However, the gameplay can feel repetitive over time, especially for players seeking variety or additional incentives to keep progressing. While the puzzles remain engaging, the lack of evolving mechanics or new challenges might make it less appealing for long-term play.

A mind workout

FlipSum - A Puzzle By Claris Richter offers a brain-teasing experience for fans of logic puzzles and number games. Its infinite puzzles and flexible pace make it an accessible choice for casual play. Those looking to keep their deduction skills sharp will find this worth playing.