... 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 "Unknown228"]
[Result "0-1"]
[Annotator "David Hayes"]
[BlackElo "0"]
[FEN "3r1rk1/1R2Rppp/p5q1/5b2/2B5/5Q2/PPP3PP/7K b - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
1... Be4 ( { Black can try: } 1... Bg4 2. Qf1 Rd1 3. Re1 Rxe1 4. Qxe1 Qxc2 { With equal chances. } ) 2. Rxe4 Qxe4 3. Bxf7+ Kh8 ( { Black dare not try: } 3... Rxf7 4. Qxf7+ Kh8 5. Qxg7# ) 4. h3 Qxc2 { Black wins with a large material
advantage. } 0-1