The Q and N just coordinate better I think. They move around each other in the same space very nicely. Q and B require the same squares and lines and can get in each other's way.
why is Q+N considered better than Q+B????
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Smothered mate is why Q+N is way cooler-looking than Q+B. Sometimes. When smothered mates actually occur, anyway.
I saw this one the other day when I should have been studying:
We were talking about this in another thread... Capablanca allegedly said Q+N were better than Q+B, Flear believes they're roughly equal, and Watson says it's complicated. So it's not so simple as, people consider Q+N better than Q+B. ;)
Capablanca did say that. It's in his book 'chess fundamentals' which is so old now I guess it must be out of copyright.
It depends on the position, as do all material imbalances (bishop vs knight 2pieces vs rook etc.)
morphy is just an amazing attacker in all his games
Having the same moves (Q+B) is sometimes better--as in Q-B batteries. Q-N seems better as they complement each other (as stated above by sstteevveenn).
People argue about Q+B having a general weakness on one color complex, while Q+N can freely threaten more along the board.
To be honest, I think that both have winning chances. Its just a matter of preference.
Charlie91 wrote:
Having the same moves (Q+B) is sometimes better--as in Q-B batteries. Q-N seems better as they complement each other (as stated above by sstteevveenn).
I'm not familiar with Q-B batteries. As far as I know (and as explained by Demitri Martin) there are no B batteries.
RandomPrecision wrote:
Smothered mate is why Q+N is way cooler-looking than Q+B. Sometimes. When smothered mates actually occur, anyway.
I saw this one the other day when I should have been studying:
God, Morphy is the f-in' man! 
TheGrobe wrote:
Charlie91 wrote:
Having the same moves (Q+B) is sometimes better--as in Q-B batteries...
I'm not familiar with Q-B batteries. As far as I know (and as explained by Demitri Martin) there are no B batteries.
Tell me if I'm wrong in my chess terms... diagram has both Q-R-R and Q-B batteries on the queen side for white. What is that formation called?
Charlie91 wrote:
TheGrobe wrote:
Charlie91 wrote:
Having the same moves (Q+B) is sometimes better--as in Q-B batteries...
I'm not familiar with Q-B batteries. As far as I know (and as explained by Demitri Martin) there are no B batteries.
Tell me if I'm wrong in my chess terms... diagram has both Q-R-R and Q-B batteries on the queen side for white. What is that formation called?
It's called mate in 1.
Yes, it's a mate in 1, but I mean the formation of the white bishop and queen. I'm just verifying if indeed it's called a Q-B battery (similar to the more familiar Q-R battery).
Charlie91 wrote:
Yes, it's a mate in 1, but I mean the formation of the white bishop and queen. I'm just verifying if indeed it's called a Q-B battery (similar to the more familiar Q-R battery).
Yes, any formation in which an attacking piece is defended by a piece which can move along the same diagonal, rank, or file is a battery. Most common are queen-bishop, queen-rook, and rook-rook.
Thanks--that should answer TheGrobe's post. 
Yes, thank you -- I wasn't familiar with the term.
you can position a knight to any square on the board. Bishops are stuck to one color.
just wondering why ppl say Q+N is better combo than Q+B?????