Flood Fill Puzzle
Flood Fill Puzzle gives you a square board splashed with random colors and a strict move budget. Everything starts from the top left corner. Each time you choose a color, the corner patch is repainted, and any touching squares of that color merge into it.
Win by making the whole board one color without going over the limit. It is a short, thoughtful puzzle that fits in a spare five minutes, and it runs in a regular browser tab with no download.
How to play Flood Fill Puzzle
Click or tap a square of the color you want next. The patch linked to the top left corner takes that color, then swallows every neighbor that shares it. Links only count through edges, so two squares meeting at a corner are not joined.
Below the grid, a status line shows moves used against the limit, for example 4 / 25. Reach one solid color within the limit and it reads COMPLETED. Run past it and you see FAILED, though you can still undo and try again.
The starting board is 12x12 on Easy with six colors. The Type menu also offers Medium, Hard, a 16x16 size and versions with fewer colors. With Custom you choose the board dimensions, anywhere from 3 to 10 colors, and the number of extra moves allowed.
Controls
| Action | Keyboard | Mouse | Touch |
|---|---|---|---|
| Repaint the corner patch | Arrow keys to move the cursor, then Enter | Left-click a square of the color | Tap a square of the color |
| Undo or redo | U / R | Undo and Redo buttons | Undo and Redo buttons |
| Fresh grid | N | New button | New button |
| Change board size or colors | — | Type menu | Type menu |
Tips
- Do not just pick the color nearest the corner. Count which choice would add the most squares to your patch this turn.
- Stretch a long arm toward the bottom right early. A thin line across the board touches many new regions and opens up big gains later.
- When one color only exists along the border of your patch, take it all in one move. That color is then gone from the board for good.
- Keep an eye on lone squares tucked into far corners. Plan to collect them on the way instead of spending a final move on each.
- Undo is free, so test two orders of the next few moves and keep whichever leaves fewer colors.
If you like Flood Fill Puzzle, try these
Light Switch GridChanging a board with as few moves as possible, flipping cells and their neighbors until all go dark.
Color Pour SortSorting colors calmly, pouring layered liquid between tubes until each holds one shade.
Questions
How do you win Flood Fill Puzzle?
Turn every square on the board into the same color before your move count passes the limit shown in the status bar. When you do, the bar says COMPLETED.
Is every Flood Fill Puzzle board beatable?
Yes. The limit comes from a built-in solver that finished the same board, so a winning route always exists. On Hard you get no spare moves beyond that solver's count.
Can I play on a phone or tablet?
Yes. A tap counts as a click, and the menu bar with New, Undo and Solve sits above the grid. The board resizes to fit the screen.
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