Online chess cannot be compared with OTB Chess. Earlier days, there used to be correspondence chess which used to be played through mails... online chess is a variation of that....
If what you say is correct, then why people lost their matches online? At a particular stage of game, each player will have a capacity to understand the game to some extent ... depending on that level (presumption is that you are not taking any external assistance), one will according to his capacity.
It is true that if you are used to analysis board, you will definitely face problems in OTB tournaments. As far as possible, it is better to visualise the game in brain rather than depending on analysis board if you want to become a tournament player.
I want to see comments of experienced players on this.
in chess.com i totaly disagree wid the procedures of online chess.chess is a head 2 head btle..in onl9 u hav a analysis board.,well ur opponent made a tricky move?? Think for 3 days. No problm.but in Live no analysis board.,presencse of time presure u may make an inattentive move.what can change the course of a match. The same happens in MASTER LEVEL TOURNEYS.so i think Live chess is far far competetive than online.WHATS UR OPINION??