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 "Spain"]
[Date "2014.??.??"]
[Round "?"]
[White "Barrero"]
[Black "Zuniga"]
[Result "*"]
[BlackElo "0"]
[FEN "6k1/5p2/1p2Pq2/1P1Q3p/2n3p1/2p1P1P1/P3P2P/5RK1 b - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
{ Win material. } 1... Qxf1+ 2. Kxf1 Nxe3+ 3. Ke1 Nxd5 { Black wins with a
large material advantage. } *