... 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 "Kasparov, Garry"]
[Black "Ribli, Zoltan"]
[Result "0-1"]
[Annotator "David Hayes"]
[BlackElo "0"]
[ECO "A00"]
[FEN "8/Pb6/8/6K1/7p/5k2/6pB/8 b - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
1... h3 2. Kh4 g1=Q 3. Bxg1 Kg2 4. Kg4 Bc6 5. Kh4 Bf3 6. Kg5 Kxg1 7. Kh4 h2 8. Kg3 Ba8 9. Kf4 h1=Q { Black wins with a large material advantage. } 0-1