- Adjust the grid size using the slider (5×5 to 10×10).
- Click on cells to select points in order. These will be numbered.
- Right-click near a cell edge to place a block preventing the path from crossing. Right-click again to remove.
- Click Solve to find the path. The solution will be highlighted with numbered steps.
- Click Clear to reset the grid.
- Click on a cell to cycle through: ☀️ sun → 🌙 moon → empty.
- Click between cells to set constraints: none → = (same) → × (opposite).
- Click Solve to complete the puzzle, or Clear to reset.
- Select a Color: Tap a color from the palette, then tap or drag on the grid to paint regions.
- Erase: Select the eraser (✕) to remove cells from regions.
- Place Queens (Optional): Long-press or right-click a colored cell to place/remove a queen.
- Click Solve to find the solution. You need exactly N regions for an N×N grid.
- Left-click a cell to open the number picker and choose 1–6; right-click to clear.
- Each row, column, and 3×2 region must contain each number from 1 to 6 once.
- Click Solve to fill remaining cells. Solved cells will be highlighted differently.
- Click Clear to reset the board.