... 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 "Unknown082"] [Result "0-1"] [Annotator "David Hayes"] [BlackElo "0"] [FEN "8/p3k3/1p4p1/2p3P1/P3K2P/3P4/8/8 b - - 0 1"] [SetUp "1"] [TimeControl "0"] [WhiteElo "0"] 1... Ke6 2. d4 cxd4 ( { Black can try: } 2... c4 3. d5+ Kd6 4. h5 gxh5 5. g6 Ke7 6. d6+ Kxd6 7. g7 Ke7 8. g8=Q { White wins with a large material advantage. } ) 3. Kxd4 Kf5 4. Kd5 a6 ( { Black can try: } 4... Kg4 5. Kc6 Kxh4 6. Kb7 Kxg5 7. Kxa7 Kf4 8. Kxb6 g5 9. a5 g4 10. a6 g3 11. a7 g2 12. a8=Q g1=Q+ { Draw. } ) 5. Kc6 b5 6. axb5 axb5 7. Kxb5 Kg4 8. Kc5 Kxh4 9. Kd4 Kxg5 10. Ke3 Kg4 11. Kf2 Kh3 12. Kg1 g5 13. Kh1 Kg3 14. Kg1 g4 15. Kf1 Kh2 16. Kf2 g3+ 17. Ke3 g2 18. Kf4 g1=Q { Black wins with a large material advantage. } 0-1