To succeed you need logical reasoning and luck. Practice certainly will take you far!
The game consists of 28 dominoes. Each domino is a rectangle divided into two square ends. Each end has a number of pips (or spots) ranging from 0 to 6.
The goal is basically to achieve a certain score. You must match the same number of pips on one end of a tile to another equivalent number of a tile available on the end of a branch on the board. You have to get rid of all the tiles you hold before your opponent.