... if your King is under attack you don't worry about losing a Pawn on the Queen's side.
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[Event "rated untimed match"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "Letelier"]
[Black "Bolbochan"]
[Result "1-0"]
[Annotator "David Hayes"]
[BlackElo "0"]
[FEN "r1b2rk1/1p2qpbp/2p3p1/2n1p3/1pP1Pn2/P1N1BN1P/2Q2PP1/R3RBK1 w - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
1. Bxc5 Qxc5 2. axb4 Rxa1 3. bxc5 Rxe1 4. Nxe1 { White wins with a large
material advantage. } 1-0