Every Pawn is a potential Queen.
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[Event "rated untimed match"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "Unknown"]
[Black "Unknown299"]
[Result "0-1"]
[Annotator "David Hayes"]
[BlackElo "0"]
[FEN "7R/8/2p2kp1/2Bb3p/1P5K/6PP/7r/8 b - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
1... g5+ 2. Kxh5 Bf3+ ( { Black can try: } 2... Rxh3+ 3. Kg4 Rxh8 4. Bd4+ Kg6 5. Bxh8 { With a likely draw. } ) 3. g4 Rxh3# 0-1