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 "Unknown144"]
[Result "1-0"]
[Annotator "David Hayes"]
[BlackElo "0"]
[FEN "2r5/1p3Qpk/p6p/2pnq3/P2p4/3P4/1P1B2PP/5RK1 w - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
1. Rf5 Qe2 ( { Black can try: } 1... Qc7 2. Qxd5 { White wins with a large
material advantage. } ) 2. Rxd5 Qd1+ 3. Qf1 Qxd2 4. Qf5+ Kg8 5. Qxc8+ Kh7 6. Qf5+ g6 7. Qf7+ Kh8 8. Rd8# 1-0