ruy lopez open varation

can somebody clearly explainsthe open variation

well, i know that N x e4 is the open variation,but whats is the ideas for both black and white? and what are the possible continuations?

thanks a lot but why does white play d4?? i really would like to understand the ideas behind it for both sides

thanks a lot guys, but why  doesnt black take d4 but plays d5? and what are the planes for both sides?

sorry im bothering  you guys..

White offers a gambit with 5.0-0.  Black has tended to run into trouble when he accepts.

Some comments by GM Julen Luis Arizmendi Martinez on the Ruy Lopez Gambit Accepted.  He writes that 6...exd4 "leads to a very nice ending for White: good chances to score the full point, almost no chances to lose. Yet, it is a dangerous variation if White does not know his theory." After Ed Lasker's 14...Be6, he goes on: "This position has come about almost by force, and the assessment is clear: White is better. This is due to the bishop-pair, especially his strong dark-squared bishop. Of course, if Black could push his e-pawn one step back in order to keep control over some dark squares, then everything would be different."