🔵 Suko

Fill a 3×3 grid with numbers 1-9 to satisfy sum and color constraints.

A.K.A.

Also known as: Suko Puzzle, Sum Puzzle

Category

Number Puzzles

How to Play

1. Place numbers 1-9 in the 3×3 grid (each number used exactly once)
2. Circle clues at intersections show the sum of their 4 surrounding cells
3. Cells are colored green, orange, or yellow
4. Each color group must sum to its target value
5. All constraints must be satisfied simultaneously

Clue Types

• Circle Clues (4): Show the sum of the four cells touching that intersection
• Color Sums (3): Show the target sum for all cells of that color

Controls

• Click a cell to select it
• Use number buttons or keyboard (1-9) to enter numbers
• Backspace/Delete clears the selected cell
• Arrow keys navigate between cells

Puzzle Source

📦 Dataset

Puzzles are loaded from a pre-computed dataset of unique solutions.

Source: Generated dataset License: Internal

Tips & Strategy

• Start by analyzing which numbers must go where based on color sums
• Small color groups are more constraining
• The center cell appears in all four circle sums - identify it early
• Use the "show errors" toggle to catch mistakes
• Process of elimination: if 8 numbers are placed, the 9th is determined

Mathematical Note

With 9 cells and 4 overlapping sum constraints plus 3 color constraints, Suko puzzles require careful logical deduction. The total of all cells is always 45 (1+2+...+9).

Issues & Bugs

🔍 Search existing issues for "Suko"

📝 Report a new bug

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Part of the Enigma puzzle collection