In other words the goal of chess is total annihilation of your opponent, to eliminate all hope and potential from their side of the board. One of the things that makes chess so unique from other board games is the fact that there are almost infinite number of positions that can arise in the quest for victory.
Consider this, after each player makes just one move there are 400 different positions possible! After 2 moves – about 72,000 positions possible. After 3 moves – 9 million. After 4 moves – 288 billion (yes, billion with a “b”) positions can arise on a chess boards. And the average chess game is around 40 moves! That translates into 10^50 legal positions in chess that are possible after 40 moves!