SUM+SUM - Play Online

Grid numbers stack up. Target sums flash at the edges. Click once to keep, twice to delete, three times to reset. Match horizontal and vertical totals or restart the whole board. Logic beats speed here—eliminate the noise, keep the signal, clear the puzzle.

How to Play SUM+SUM

Retain only the numbers that sum to the specified values displayed at the end of each row and column. Click tiles to toggle their state: first tap marks keep, second tap marks delete, third tap resets. When every line matches its target, the level ends and rewards unlock.

Grid Manipulation and Click Cycles

Each numbered tile cycles through three states. One click highlights it green—you've committed to keeping that value. A second click turns it red—marked for removal. A third click clears both flags, returning the tile to neutral. Plan your moves before locking in a decision, because rows and columns must both balance simultaneously to solve the board.

Progression and Reward Chests

Clear levels to earn gold coins. Spend coins on hints when you're stuck or time extensions when the countdown pressure mounts. After finishing a stage, tap the chest icon to collect bonus loot—power-ups, extra hints, or currency multipliers. Three-star ratings appear based on completion speed and hint usage, pushing you to optimize every grid.

Strategy and Pro Tips

Start with rows or columns that have the fewest tiles—fewer variables mean faster elimination. Cross-check totals as you go: if a row needs 12 and you've kept 8, you need exactly 4 more from the remaining tiles. Use the hint button sparingly; it costs coins, but reveals one correct keep/delete choice when you're gridlocked. Restart costs nothing, so experiment freely until the pattern clicks.

Key Features

• Triple-Click Toggle System: One tap keeps, two taps delete, three taps reset—cycle through states to isolate the correct numbers.
• Flat Vector Aesthetic: Soft shadows, pastel tiles, and high-contrast UI deliver instant readability on any screen size.
• Gold Coin Economy: Earn currency per level, spend it on hints or time skips, and unlock reward chests for bonus resources.
• 4×4 Grid Puzzles: Difficulty scales from Easy upward, balancing horizontal and vertical sums across progressively tighter number sets.

Who is SUM+SUM for?

Brain-training seekers who crave quick logic bursts. Commuters tapping through puzzle games during short breaks. Sudoku fans looking for a twist on elimination mechanics. Anyone who enjoys Block Blast 2048 will recognize the same numerical grid satisfaction here—merge and match logic applied to sum constraints. Players who dig the methodical removal in Arrow Puzzle will appreciate the deliberate click cycles. If Nuts Puzzle: Sort By Color scratched your organizational itch, this grid-based system offers the same keep-or-discard flow. Fans of Sort The Colored Hexagons will find similar tile-state toggling and strategic elimination loops.

Developer

SUM+SUM was developed by carolineblueeyes. This browser-based number puzzle strips away unnecessary complexity, delivering instant logic challenges with zero downloads—click and play on desktop, Android, or iOS.

Controls

• Left Click / Tap: Cycle tile state (keep → delete → reset)
• Hint Button: Reveal one correct tile decision (costs coins)
• Timer Button: Extend the countdown (costs coins)
• Restart Button: Reset the current board to initial state