How to Solve Heyawake — Complete Strategy Guide for Beginners

Heyawake has just three rules: 1. **Numbered rooms**: A room with a number must contain exactly that many shaded cells 2. **No three in a row**: Shaded cells cannot form a continuous line of 3 or more horizontally or vertically 3. **White connectivity**: All unshaded (white) cells must be connected — you must be able to reach any white cell from any other white cell Rooms without numbers can contain any number of shaded cells (including zero).

The easiest entry points are rooms with extreme numbers: **Room size = number**: If a room has 4 cells and the number is 4, shade all cells. **Room number = 0**: Don't shade any cells in this room. **Room number = 1 in a 1×1 room**: Shade that single cell. **Look for forced cells**: In a 1×3 room with number 1, the center cell cannot be shaded (it would block white connectivity on both sides), so the shaded cell must be one of the ends.

The "no three shaded in a row" rule is powerful: - If two cells in a row are shaded with a gap between them, the gap cell must also be unshaded (or you'd create three in a row). - If you see two shaded cells next to each other, the cells immediately before and after must be unshaded. - This creates "walls" of forced unshaded cells that propagate through the grid. Use this rule constantly — it eliminates candidates in almost every step.

The white connectivity rule is the most sophisticated constraint: **Island detection**: If shading a cell would isolate a group of white cells from the rest, that cell must be white. **Corridor thinking**: Long narrow passages of white cells must stay connected. If a room spans the passage, you can only shade cells that don't block the corridor. **Edge analysis**: Cells at grid edges and corners have fewer white neighbors, making them more likely to need shading without breaking connectivity.

To improve at Heyawake: 1. Start with small 5×5 grids and work up to 10×10 2. Always check for connectivity after every shade — catch mistakes early 3. Use the three-in-a-row rule before checking room numbers 4. Look for rooms that span multiple rows/columns — these create the strongest constraints 5. Mark cells you know must be white with a dot to track connectivity Play Heyawake free online on Free Games Hub with 100+ puzzles from beginner to expert.