... 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 "Unknown"]
[Black "Unknown426"]
[Result "0-1"]
[Annotator "David Hayes"]
[BlackElo "0"]
[FEN "r3r1k1/bQp1nbpp/p2q4/P5N1/6P1/1B5P/1B3P2/R3R1K1 b - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
1... Qg3+ 2. Kh1 Qxb3 3. Qxb3 Bxb3 4. Ne6 Bxe6 5. Rxe6 Bxf2 6. Rf1 Bh4 { Black wins with a large material advantage. } 0-1