Objective

Each puzzle starts with a full number grid. Your task is to remove extra numbers so that every row and every column reaches the target sum shown on the right and bottom.

Difficulty Sizes

• Easy: 5×5 grid
• Medium: 6×6 grid
• Hard: 7×7 grid

Lives

You have 3 chances. If you click a number that should not be removed, you lose one chance. Losing all 3 chances ends the game.

Controls

• Left click: remove a number
• Right click: highlight a number you want to keep
• Rows/columns auto-mark as complete when sums match

Completion State

A row or column is marked complete automatically when its active numbers match the expected sum.