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 "Albena"]
[Date "1989.??.??"]
[Round "?"]
[White "Pachtz"]
[Black "Fernandez"]
[Result "1-0"]
[BlackElo "0"]
[FEN "6k1/1b4pp/1B3p2/4p3/1Pr5/5P1P/r5P1/5BK1 w - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
{ Win material. } 1. Bxc4+ Kf8 2. Bxa2 { White wins with a large material
advantage. } 1-0