How can I study to play chess in grandmaster level? I have spend 18 years for chess.?

To be honest, you will probably not make it to grandmaster level unless you get a good chess coach. Players really don't make grandmaster today on their own (not that you couldn't do it yourself, just going by the odds here)... Also, playing online is fine, but you need to enter tournaments and be successful... grandmaster titles are not awarded for online play, you have to be successful at OTB (over-the-board) play, in FIDE-sanctioned events. I take that back..there actually are titles awarded for correspondence play, but is that what you're looking for? In order to become a great player, you really do need to get a good coach, and follow a specific plan of training...randomly studying chess books on different topics will not lead to mastery of the game (just as getting an advanced degree in ANY field requires following a pre-defined plan of study and testing). In studying openings, it is important to know WHY each of the moves are made...it is not enough simply to memorize variations because, as you said, you couldn't remember them all... that's why it's important to know WHY moves are made, so that you won't have to memorize as much, you'll simply know HOW to play the proper move in a given situation. Also, openings should be the LAST thing you study...you should first master tactics, then endgames, then middlgames... the reason for this is because it's easier to study and really learn the game when there are only a few pieces on the board, so that you can see and learn how different combinations of pieces work together, without cluttering up the board with pieces that are irrevelant to the given situation. Once tactics, endgames and middlegames are mastered, it is really only then that you should venture into 'learning' openings. This is not to say that you should not learn and use good opening PRINCIPLES (i.e. no more than one or two pawn moves in the opening, develop knights before bishops, don't move your Queen out too soon, castle early, control the center, etc)... but individual openings should really not be studied in detail until after these other areas are mastered. Tactics must be mastered first, because games between "Class Level" players (i.e. players below the "Expert" level) are won and lost because of tactical ability, or lack thereof... Gary Kasparov himself has said that "Openings really don't matter at the beginning level", because tactical mistakes decide the vast majority of games between "class" level players. Class players who memorize openings will lose every time to a class player who has mastered tactics. The kind of advice needed to become a grandmaster is not free, so if you're looking for a 'free' way to become a grandmaster, the odds are very long against you... Plus, you need to learn how to make a plan. This is done by analyzing the position after each move, and identifying weaknesses in your opponents position that can be attacked. If you want a couple of recommended books, I might suggeest checking out Jeremy Silman's "How to Reasses Your Chess" and "The Amateur's Mind"... I might also suggest Yasser Sierawan's "Winning Chess" series, and studying those books in the following order: 1) Winning Chess Tactics 2) Winning Chess Endgames 3) Winning Chess Strategies 4) Winning Chess Combinations 5) Winning Chess Brilliancies (You might check out "Play Winning Chess" as well...this is the first book in the series and contains some annotated games by Sierawan, but it explains how chess is played, and might be too simple for you at this point). Another good book, which should be in every player's library, is "Logical Chess, Move By Move" by Irving Chernev...this contains the moves of 33 grandmaster-level games, and EVERY move is explained as to its purpose, and the book also includes analysis of variations that COULD have been played. And again, correspondence chess is fine, but you really should enter some tournaments in order to really assess your OTB play under game conditions. If you do play online, such as at gameknot, I would not recommend using any type of 'best move' feature... you need to be able to make your own moves, and win or lose with them. You can not get to Grandmaster level by using engines to check for the best move (this is not a comment on the gameknot site specifically, I have never played there...this is a comment on using engines or any other type of aid to determine the 'best' move)... Good luck to you Salim!

practice makes perfect... ok, i'm 18 and i've been playing chess for 12 years now, and right now i'm at a 2700 rating but not because of opening book theory... you don't need that for anything except figuring out how your opponent is going to start... if you rely on the opening book too much, the first variation will throw you off and lead to a loss for you... so work on your own style and remember time management

it is a logical game

My husband plays on gameknot. There is a small fee I think, but he really enjoys the challenge. Playing against people at your level or a little better is a good way to improve. Also, I believe there is a function to check "best moves" on that site.

i would suggest playing online on yahoo, best ways to improve your skills is playing and practicing, not everything can be taught by books