It's a peculiar game as you have to try to get your brain to "look" for the colours/objects that aren't there. You can consciously eliminate the objects one by

It's a peculiar game as you have to try to get your brain to "look" for the colours/objects that aren't there. You can consciously eliminate the objects one by one, but inevitably someone else will be quicker than you. When you get the knack for how to quickly find the missing item, you suddenly end up winning lots of round in a row.