A passed pawn increases in strength as the number of pieces on the board diminishes.
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[Event "rated untimed match"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "Unknown"]
[Black "Unknown681"]
[Result "0-1"]
[Annotator "David Hayes"]
[BlackElo "0"]
[FEN "2r4k/pB1r1p1b/q3p2p/1R2p2P/P2b4/2N3P1/1P2QP2/3R2K1 b - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
1... Rxb7 2. Rc5 Rc6 { Black wins with a large material advantage. } ( { Black
dare not try: } 2... Bxc5 3. Qxa6 { White wins with a large material
advantage. } ) 0-1