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 "Unknown589"]
[Result "0-1"]
[Annotator "David Hayes"]
[BlackElo "0"]
[FEN "2r1k3/R3b2r/4p3/3p1p2/3P1R1B/7p/PPP4P/2K5 b - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
1... Bxh4 ( { Black can try: } 1... Rxh4 2. Rxe7+ Kxe7 3. Rxh4 Kf6 4. Rxh3 Rc4 5. c3 e5 6. dxe5+ Kxe5 7. Kd2 d4 8. cxd4+ Rxd4+ 9. Ke2 Rc4 10. Rc3 Rh4 11. h3 f4 12. Kf2 Kd4 13. a4 { White wins with a large material advantage. } ) 2. Rxh7 Bg5 3. Rh4 e5 4. dxe5 Rc4 5. Rxh3 Rxf4 6. Kd1 { Black wins with a
large material advantage. } 0-1