Every Pawn is a potential Queen.
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[Event "rated untimed match"] [Site "?"] [Date "????.??.??"] [Round "?"] [White "Emanuel Lasker"] [Black "Siegbert Tarrasch"] [Result "0-1"] [BlackElo "0"] [FEN "8/5KBB/p4b2/1pp1kb2/8/1P6/1P5P/8 b - - 0 1"] [SetUp "1"] [TimeControl "0"] [WhiteElo "0"] 1... Be6+ { Taking aim at b3. } 2. Kg6 Bxg7 3. Kxg7 Bxb3 { Black will soon promote. } 4. h4 Bd1 5. Kg6 c4 6. Bg8 Kd4 7. h5 Bxh5+ 8. Kxh5 b4 9. Kg4 c3 10. bxc3+ Kxc3 11. Ba2 b3 12. Bb1 a5 13. Kf3 a4 14. Ke2 a3 15. Kd1 a2 16. Bf5 a1=Q+ { White wins with a large material advantage. } 0-1