About Colour Flood
Colour Flood starts with a ten by ten board of six colours scattered at random. You control a patch in the top left corner. Each move changes the colour of your patch, and every neighbouring square that already has that colour joins it. The patch grows like spilled ink.
How it works
Each colour also carries a number from 1 to 6, so you can play entirely by number if the shades are hard to tell apart. The move counter runs up to 22. Fill the board before it runs out and you win. Otherwise the game tells you how many squares you were short.
Solving tips
The obvious choice is the colour that adds the most squares right now. It is a reasonable start and it will often lose. What matters more is reach.
Head for the far corner. Your patch begins in one corner, so the opposite corner is the furthest thing from it. A long thin arm stretching diagonally across the board touches far more squares than a fat blob in the corner, and every square you touch is one you can absorb next.
Look two moves ahead. Sometimes a colour that gains only two squares now opens the way to a dozen on the next move.
Finish colours off. If only a few squares of one colour remain on the board and you can take them all in one go, that colour is gone and you have five to deal with instead of six. In the endgame you want to be removing a whole colour with nearly every move.
Count what is left. With six moves remaining and five colours still on the board, there is no room for a wasted turn. It is one of those HTML5 games that looks like luck and turns out to reward planning.