So, the above line in the Berlin defense seems to be one of the more critical tries for white.  I have looked at several videos on this position, with analysis ranging from the opinion that white is clearly winning to the opinion that the position is dead even.  I am looking at his mostly from Black's perspective, so see if the Berlin is perhaps a way I might like to meet the Ruy Lopez, and I don't think I would be completly comfortable with this position.  Although the Queens have been exchanged, the black king is in the center with an open position and white certainly has an edge in King safty.  The Berlin has a great reputation as being very solid (and drawish at master level), but I am wondering if that might perhaps be with some other variation.  I have ventured the Nxe4 variation in a few games now, but I think I have run into sub-optimal play from my opponents thus far.  5 d4 troubles me.

Hello Sofademon. When my opponent play 3...,Nf6, now i play the simply 4.d3. The Berlin "Wall" is very difficult to play for me, then that's immediately a endgame. I play the Ruy-Lopez for the great many tactical and strategy idea in the middlegame, so if i accept to play again the Berlin open variation, i can not play my style. But, i have play some games again the open line and for me, the line 9...,Ne7 with the idea to going with the King in the Queenside (b7 square) is the most critical line.

I'd like to see a link to a master claiming that this position is clearly won for white, and I'd also like to see some example lines.

 I agree, the opening has a strong reputaion as being solid and drawish at master level.  But I am also uncomfortable with the fact that black's king is stuck in the center in a wide open position. 

I was just tyring to point out that the vidoes that I had found poking about the internet were very mixed in their evaluation of the position.  Which is not surpising, anyone with a pulse, a microphone, and chessbase can put an opening theory video on youtube.  I was really looking for someone who could perhaps reasure me that this position is really as solid/drawish as some say it is, as I was considering it as a way to reply to the ruy lopez.  I am sure I lack the experience to understand much of the positional subtly here, but I would be pretty happy as white with this. 

I've played the Berlin in several games, but as you may know, very few people actually play d4 going into the ending (most play Re1). As for the position in the diagram, I think white is better, but not by much and black has plenty of chances to win at our level (unlike those GM games where it is used as a drawing weapon).

i would play 9.Bg5 as white

It might be used by GMs to draw, but it is definitely harder to play for black than for white. The black player has to be careful not to fall victim to tactics exposing his central king (e.g. with Re1/Ng5/e6), or allow white to create a passed pawn with his kingside majority, or lose his bishop pair, etc.

I'm not sure what you're looking for in a defence against the Ruy, but for winning chances this isn't your answer, and neither is it for an 'easy' draw (the Petrov would be better to that extent, but is more theoretical).

A clear sign that this person doesn't understand the Berlin Wall.  "Losing the Bishop Pair", if lost the right way, is a pipe dream for Black.  If White makes a naive move like Re1, Black is in heaven.  Bb4!! gets Black his most desirable trade.  Black throws away his dark-squared Bishop for White's Knight.  The Berlin is all about stopping g4, and subsequently, stopping the mobility of White's pawn majority.  White typically ends up with pawns on e5, f4, g2, and h3.  The Knight on c3 can move to the Kingside to aid in the g4 push.  The Dark-Squared Bishop of Black's can't do anything to prevent it, and so Black throws away a useless piece for a useful one.  It also leads Black to one of his 3 most desirable endings in the Berlin with 8.Qxd8, namely DSB vs LSB, N vs LSB, or DSB vs N.  Black gets the rooks off, and one of these 3 is very likely as the OCB's likely won't be traded as that's hard to do anyway.  More typical is Black trades his LSB for White's Knight, leading to the DSB vs N scenario, White trades his DSB for Black's Knight, leading to the N vs LSB scenario, or the Knights are traded off, in which you then have OCB's.

Black's best minor piece in the Berlin - The Light Squared-Bishop

Black's worst minor piece in the Berlin - The Dark-Squared Bishop

The Bishop Pair isn't what many player make it out to be in the Berlin!

Here's Judit beating the Berlin defence last year

That's pretty neat how you analyse things so fast, pfren

Oh. I remember watching the game between Judit and Sergey last year, and I didn't understand the strategy or how deep it was until the last move: luring the black king as far away as possible so Judit could win the pawn ending on the other side of the board. So clever, and very informative!

Vladimar Kramnik is an advocate of this as black

"His [Kramnik's] faith in the Rio De Janeiro Variation [the line in question] in the Spanish Game, his main weapon in his title match against Kasparov [which he won], turned out to be justified. Although the line had a reputation for being a bit dubious, hard work in the chess laboratory determined that it is playable. White certainly seems to stand better, but Kramnik showed that it is very, very hard to defeat."

-Eric Schiller

Instead of 10.h3 White should go for simplifications more directly (10.Ne2!, and now as soon as a black bishop occurs on e6: Nf4! or Nd4!. According to good old Philidor White is supposed to battle the pieces which hinder their (potential) passed pawn from advancing, so instead of 10.h3?! I think 10.Ne2! goes for this idea more directly.

But then, again, I'm very bad at constructing good positional plans, so this 10.Ne2 is maybe a blunder.

In my database it was rarely played but it scores 57%, which is very good imo.

I don't get the reasoning behind 10.h3?!, to me - aside from slightly weakening the kingside, it looks like a useless waste of a time.

So maybe it's really as early as move_10, where White can find improvements.

Here a more 'visual' version of this idea:

What are the drawbacks of this idea 10.Ne2?

What is the purpose of 10.h3? Sure the strong masters don't think that it's a waste of a time?

Thanks for tipps, although I'm a Ruy player I've not yet studied the Berlin in detail, because it's rarely played.

4.d3 not going into the Berlin endgame has been played sucessfully by Anand and Ivanchuk.  Kasparov has showed some regret at not trying 4.d3 in his match with Kramnik.