All are importants but in some positions some are more importants,depend of openings,of positions.
Central Squares

I read somewhere ( I kick myself nowadays because I can't remember where ) that Fischer always work to win one of these squares ( don't remember which ) and once he gets it, the game is virtually over because he projects from there ( an outpost ? ). But this is certainly beyond the opening, can anyone elaborate further ?
Logically, those central squares closest to the opponent's castled king ( depending on which side he is castled ) are more important than the other two. But I haven't focused on the fight for these squares. I always thought the central squares are just good to keep until development is complete and thereafter they are not useful. But obviously, that's not really true - and I think I will be a better player if I can just understand why.

That depends if you playing so-called light square game or black square game - which basically means what squares you are trying to dominate. So, if you place pawns on d4 & e5 - light squares (increasing the value for light sq bishop) become more important since black squares are being occupied by pawns.

That depends if you playing so-called light square game or black square game - which basically means what squares you are trying to dominate. So, if you place pawns on d4 & e5 - light squares (increasing the value for light sq bishop) become more important since black squares are being occupied by pawns.
This is the first time I have heard of dark- and light-squared games...it does make a lot of sense. I will look further into this. Thanks for the tip, Yury.
Like the eternal question posed by all chess players "What is going to be my plan ?" , how do I know what type of square games I am going to play on the onset as the game is also determined by the opponent ?

d4 pawn, f4 bishop and f3 knight - they all aim on e4! The main idea is, it is absolutely does not matter what kind of game you're playing: light squared or dark squared as long as you understand that you got to eliminate your opponents opposite color bishop, saving yours (in perfect case). That is basic idea of positional play when you are taking control of key squares (diagonal) you need to exchange the protecting bishop to increase your influence.
Similar idea is to exchange your opponent's fiencetto bishop to weaken the key diagonals a-h or h-a. I'm sure you know that.
I hope it's not too confusing.

I read somewhere ( I kick myself nowadays because I can't remember where ) that Fischer always work to win one of these squares ( don't remember which ) and once he gets it, the game is virtually over because he projects from there ( an outpost ? ). But this is certainly beyond the opening, can anyone elaborate further ?
Logically, those central squares closest to the opponent's castled king ( depending on which side he is castled ) are more important than the other two. But I haven't focused on the fight for these squares. I always thought the central squares are just good to keep until development is complete and thereafter they are not useful. But obviously, that's not really true - and I think I will be a better player if I can just understand why.
it was his bishop/knight on d5[it is in chess mentor]

Not confusing at all, Yury because you have taken time to explain it well.
I think I understand what you are getting at. Just as much as I want to increase my influence ( in this case, the e5 square ), I should also want to reduce my opponent's influence ( in this case, the e4 square ).
The e5 square is contested by White 3 times whereas it is contested by Black only twice ( the two Knights ). It appears that White had planned to fight for the e5 square right from the beginning. This means that the opening is not just about achieving development, grabbing space but also positioning for key squares.
Thanks again Yury

I read somewhere ( I kick myself nowadays because I can't remember where ) that Fischer always work to win one of these squares ( don't remember which ) and once he gets it, the game is virtually over because he projects from there ( an outpost ? ). But this is certainly beyond the opening, can anyone elaborate further ?
Logically, those central squares closest to the opponent's castled king ( depending on which side he is castled ) are more important than the other two. But I haven't focused on the fight for these squares. I always thought the central squares are just good to keep until development is complete and thereafter they are not useful. But obviously, that's not really true - and I think I will be a better player if I can just understand why.
it was his bishop/knight on d5[it is in chess mentor]
Thanks Mebeme...yes, I got chessmentor - I'll go look it up. Your memory must be photographic !!!


luischess, by your definition ( bad bishop is the one the same colour as our pawns are in ), then White's "bad bishop" is the dark-squared one because White's pawn chain is on dark squares. Following your definition again, his "good bishop" (the one thats on a different colour his pawns are) is the dark-squared bishop because his pawns are on the light squares.
OK - it's a dark-squared bishops fight. But how does this gel with :
1) reducing Black's light squared bishop's influence on e4
2) trading my dark-squared bishop means that instead of 3 pieces ( pawn, Knight and Bishop ) pressuring e5, it will be reduced to 2 ( not enough to beat Black )
3) White's dark square bishop is outside its pawn chain. It's only blocked by its own pawns if it needs to go backwards. It's not exactly a good bishop but it's definitely not a bad bishop.
Can you explain further. Thanks

Roy, I think you already got the answer on your question, but let me repeat once again. If you're White and your pawns are on dark squares that means that b1 - g6 diagonal is weak, so is e4square. In such position (Slav/SemiSlav) c2 is a great square for White's queen. However, since black's light squared bishop control this square it is good to exchange the bishop.
hope that somewhat helps,

Well, you right, sometimes they actually do create escape square by playing h6, but there are some problems with that move: it weakens king side since h6 becomes a target for possible sacrifices/attacks, time is needed which black is usually short on, and if White really wants to it is possible to exchange light sq bishops placing light bishop on d3.
Game can also take different path with a queenside attack. Which one is stronger? There is no answer...
I hope it clears a bit.
BTW if you want to take a look on the game I recently played on USCF with SemiSlav check out the game here: http://thechessworld.com/delgp5-1.html

That depends if you playing so-called light square game or black square game - which basically means what squares you are trying to dominate. So, if you place pawns on d4 & e5 - light squares (increasing the value for light sq bishop) become more important since black squares are being occupied by pawns.
And this is one reason why retaining your bishop pair is important. Two bishops can attack or put pressure on all four central squares more easily and from a greater distance than all other combinations of minor pieces.

Roy, here is that Queens Gambit/Semi Slav D15:
I think already posted that game on chess.com,you can look it up. My comments for this game are here.
Which of the central squares are more important - d4,d5,e4 or e5 ? As a point of reference, let's say the player is playing White. Can you explain why.