The advantage of the two bishops (when facing a bishop and knight or two knights) is a favorite of many masters. When working together, the two bishops can really dominate the chessboard.
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[Event "rated untimed match"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "Unknown"]
[Black "Unknown519"]
[Result "0-1"]
[Annotator "David Hayes"]
[BlackElo "0"]
[FEN "3r1k2/Q1R2p1p/4p1p1/4q1b1/8/1P4N1/P4PPP/6K1 b - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
1... Rd1+ 2. Nf1 Qe2 3. Rxf7+ Ke8 4. h3 ( { White can try: } 4. Qa8+ Kxf7 5. Qf3+ Qxf3 6. gxf3 Re1 { Black wins with a large material advantage. } ) 4... Qxf1+ 5. Kh2 Bh4 6. Qa4+ Kxf7 7. Qxh4 Qh1+ 8. Kg3 Rd3+ 9. Kf4 Rd4+ 10. Kg5 Qxg2+ 11. Qg3 Kg7 12. Qxg2 h6# 0-1