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 "Unknown05"] [Result "1-0"] [Annotator "David Hayes"] [BlackElo "0"] [FEN "r3r1k1/3R2p1/p1q2p1p/1p2pQ2/4P3/1P5P/P5P1/5R1K w - - 0 1"] [SetUp "1"] [TimeControl "0"] [WhiteElo "0"] 1. Qg4 Qxd7 { There is no better way to defend g7. } 2. Qxd7 { White wins with a large material advantage. } 1-0