The easiest board to rack up a high score on is the top right board in classic mode. It has the most droppers and collectors with the same short path requirement the very first board had. It is nearly impossible to attain this without having become very skilled at causing multipliers, Chain Reactions, and Full Houses. See Full House to find out more about full houses. Multipliers are gained by activating more paths while previous ones are still going. The only way to carry it over when a path disappears is by creating Chain Reactions, so hitting very high multipliers and taking advantage of them with Full Houses at the same time will take a lot of practice. Below is a video of a player chaining several times to continue his multiplier, even including a full house.