Color Flood

You own the region in the top-left corner. Each move, pick a colour: your whole region changes to that colour and absorbs every neighbouring square of the same colour. Keep going until the entire board is a single colour.

The move limit is based on a solution the computer finds for the same board, plus a margin that shrinks as the difficulty rises. On Expert there is no margin at all.

1. Tap a colour button (or press 1–6).
2. Your region changes to that colour and grows.
3. Fill the whole board before you run out of moves.

• Aim for the centre early. Reaching the middle of the board exposes more colours at once.
• Pick the colour that adds the most squares, but look one move ahead: sometimes a smaller gain opens a much bigger one.
• Finish isolated colours last. Small islands are cheap to collect at the end.