Map

Map challenges you to color a randomly generated map so that no two neighboring regions share the same color—putting the famous four-color theorem to the test through pure logic.

Map is a logic puzzle for single-player brain teasers, inspired by the classic four-color theorem in mathematics. The goal is elegantly simple: color the regions of a map so that no two adjacent regions share the same color—yet the execution offers a surprisingly deep and satisfying logical challenge.

In the game, the playing area is divided into irregularly shaped regions (like countries on a map). You must assign a color to each region using a limited palette—typically four colors—ensuring that any two regions sharing a common border (not just a corner) are colored differently. The puzzle is procedurally generated, guaranteeing a unique layout each time, and always has a solution that can be reached through pure deduction.

Map is not about artistic coloring—it’s a test of constraint satisfaction and spatial reasoning. As you work through the grid, you’ll use process of elimination, adjacency tracking, and strategic coloring to avoid conflicts. The interface is intuitive: click a region to cycle through available colors, and right-click to mark uncertain areas or add notes.

Color the map using four colors so that no two adjacent regions share the same color. (Regions that touch only at a corner are not considered adjacent.) There is a unique valid coloring that is consistent with the regions already colored at the start.

Drag from a colored region to a blank one to fill the latter with the same color. Drag from outside the grid into a region to erase its color. (You cannot change the colors of the regions provided at the beginning of the game.)

Right-drag from a colored region to a blank one to add dots indicating that the latter region might be the same color as the former—or right-drag again to remove those dots.

Click the "Undo" button to undo the last move. Click the "Redo" button to redo the last move. If you're not sure how to solve it, you can use the “Solve” button to automatically fill in the puzzle. It also supports alternative coloring modes and grid styles via the Type menu for added variety.