Probably any chess move or scenario that you can possibly imagine has already been done before. There is probably no original move or tactic that you will invent that has not been done a hindered times over by others. Because of this it is important to learn from those who have gone before you. One great way to learn tactics and tactical combinations is to use chess problem diagrams. Chess problem diagrams can be found for free and for charge on multiple chess Internet sites as well as in many different chess books.
Chess problem diagrams generally present a game scenario and want you to try to determine the best way to solve the problem. This may include ways for you to place your opponent into checkmate in the next two moves, or it may be a problem diagram that wants you to capture the queen in the next four moves. Whatever the chess problem diagram is trying to teach you, the information and knowledge that you gain can be invaluable. Frequently these chess problem diagrams are situations that you have faced before in games or will face in future games of chess.
Whether you utilize the Internet sites to look at the problem diagrams or you decide to use books, both generally offer the "best" solution to the problem presented. You may find an alternate solution to the problem presented, but the one that is offered as the "best" solution is usually done in the fewest moves with the best outcome. Chess is a game of skill, not a game of luck, because of this serious and long term studying of the game and problems are needed if you want to see dramatic improvements in your personal chess game.