I know that Queens and Rooks are huge mating keys, but how to you attack them?? I think that in most attacks Knights are the most powerful. Knights are THE ONLY PIECES that can attack a Queen without being attacked by her.
completely depends on the position. There are cases where a knight dominates a bishop and cases where the bishop dominates the knight. It is all a result of the present position.
It's true that when a bishop or rook threatens a queen, the queen is also threatening the bishop or rook. But the side with the queen stands to lose much more from the trade, so as long as the bishop or rook is protected this isn't such a big concern.
I think you have the right idea, though. At your level a knight is much more dangerous than the bishop and learning its moves will improve your game. 
I believe that Knight is more vital in a closed game, while Bishop can utilize its power more in an open game.
I believe that Knight is more vital in a closed game, while Bishop can utilize its power more in an open game.
true, but there are still even the exceptions to those rules....
I believe that Knight is more vital in a closed game, while Bishop can utilize its power more in an open game.
true, but there are still even the exceptions to those rules....
Rules or opinions?
this could happen...
If you want a general rule of thumb when deciding whether to keep a bishop or trade him for a knight try to establish a "good" bishop and a "bad" bishop. You can do this by placing your pawn structure on either black or white squares. Then your "bad" bishop is the bishop that is of that colour--that is the same colour that your pawn structure is on--and your "good" bishop is the bishop of opposite colour. In general, it is always good to trade your "bad" bishop for your opponent's "good" bishop or one of his knights. So to give a specific example:
It's hard for me to understands the quarters... if it will be 3 Vs 3.1 the diffrence will be almost the same, so why to deal with 2 different frections?
Iv'e heard two things:
1. The bishop and the knight both equal 3 pawns, thire unique abilitys may make one preberable, but baiscly they are the same...
2.The bishop is 3.25 and the knight is 3.
personaly i agree with the second, because two picese, with so different abillitys almost can't be valuable the same.
but as i mentiond before, the frection is only here to show a little change, and little changes allways metter the situation.
Baiscly: close center - knights
open center - bishops
But there are a lot of exeptions and you need to keep watching...
I believe that Knight is more vital in a closed game, while Bishop can utilize its power more in an open game.
true, but there are still even the exceptions to those rules....
Rules or opinions?
Rules. Knights ARE better in (most) closed positions. Bishops ARE better than knights in (most)endgames with pawns on opposite sides.
I know that Queens and Rooks are huge mating keys, but how to you attack them?? I think that in most attacks Knights are the most powerful. Knights are THE ONLY PIECES that can attack a Queen without being attacked by her.