How to Play

Use 4 colors to fill every region on the map, ensuring no adjacent regions share the same color.

Operating Instructions

• Select a color from the palette below the map
• Click a region to apply the selected color
• Gray regions: not yet filled
• Darker regions: pre-filled, cannot be changed
• Red-highlighted regions: color conflicts with adjacent region, needs adjustment

Mobile Device Tips

• First tap: select region
• Second tap: place currently selected color

A Note on Approach

Take time to consider how regions relate to each other. Sometimes a different color arrangement makes the whole map suddenly clearer.