Hey! the knight can't even pass through this "barrier" or it will be captured if you try...So it's draw unless if you sacrified something...
and which do you think is the most usefull?
Nether of them in this position.
But in another position no position for example?
What do you want to say?
It's amazing how many players can overlook the obvious.
It's the queen.
But consider that it's out of commission several days a month.
It's close between shortstop and catcher.
The King's position is unique and cannot be a part of this argument, as when it is inevitably lost, the game is also lost. As an active attacking or defending piece, it is comparatively insignificant. Having said this, I don't see that it can be denied that the Queen is the most powerful and therefore valuable piece, in view of its extra mobility. The only piece which it cannot mimmick is the knight,
If you are using your king passively or insignificantly, you will lose otherwise equivalent midgame to endgame transitions. As Steinitz said, the king is a fighting piece and you should not be afraid to use it as such.
That said, clearly anything the king can do the queen can, and it doesn't go the other way. Similarly, anything a bishop or rook can do, so can a queen. Really, the most useful pieces are queen, knights, and pawns (no other piece can en passant!), and I would put the pawns as a whole before the knights because their structure is the skeleton of the game. I guess, though, it's common to say "pawns are not pieces", though, so maybe they don't apply here.