Sum Chain

About Sum Chain: Fast-Paced Logic Puzzle

Sum Chain is a fast-paced logic puzzle built around a single elegant rule: connect tiles so that the last number in your chain equals the sum of all the ones before it. The challenge is to clear the entire grid before the timer hits zero, across 200 handcrafted levels. One scene shows a 3×3 grid of nine square tiles with dark purple and light orange backgrounds. In that same scene, an orange horizontal line runs through the centers of the three bottom tiles.

How to Play Sum Chain

Every chain follows one rule — the final tile selected must equal the sum of all previously selected tiles. Clear the grid before the timer reaches zero to complete a level. Finish quickly enough to earn 3 stars, or simply beat the clock to pass. Tiles can be shared between two different chains, so strategic overlap is part of solving the harder layouts. Hints are available when you get stuck, but the clock keeps running while you use them.

Controls

• Click and drag (Desktop): Link tiles to build a chain
• Release (Desktop): Submit the chain
• Drag back (Desktop): Undo the last tile in the chain
• Tap and slide (Mobile): Build your chain
• Lift (Mobile): Submit the chain
• Slide back (Mobile): Undo the last tile in the chain

Games You Might Like

If Sum Chain's number-linking puzzles appeal to you, the broader Puzzle games collection on Playgama has plenty of grid-based and logic challenges to keep your brain working. For more number-focused challenges similar to Sum Chain's arithmetic core, the Math games category is a natural next stop, while the Brain games section rounds out the selection with training-style puzzles that reward sharp thinking.