A passed pawn increases in strength as the number of pieces on the board diminishes.
If you are reading this instead of viewing a chess puzzle or game, then you must enable JavaScript on this website.
[Event "rated untimed match"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "Unknown"]
[Black "Unknown021"]
[Result "0-1"]
[Annotator "David Hayes"]
[BlackElo "0"]
[FEN "4r3/P7/8/8/1K6/2R2p2/6k1/8 b - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
1... f2 2. Rc1 Ra8 3. Kb5 Rxa7 4. Kb6 Rf7 5. Rc2 Kg1 6. Rc1+ f1=Q 7. Rxf1+ Kxf1 { Black wins with a large material advantage. } 0-1