A passed pawn increases in strength as the number of pieces on the board diminishes.
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[Event "Opera Euro Rapid"]
[Site "?"]
[Date "2021.??.??"]
[Round "?"]
[White "So, Wesley"]
[Black "Carlsen, Magnus"]
[Result "0-1"]
[Annotator "David Hayes"]
[BlackElo "0"]
[FEN "r1q2rk1/1p3ppp/2pp4/p7/3QP2n/2P1B2b/PP3P1K/R2BRN2 b - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
{ A tactic the World Champion failed to find. } 1... Bg2 2. f4 ( { White can
try: } 2. Ng3 Qh3+ 3. Kg1 Bf3 4. Bxf3 Nxf3# ) ( { White can try: } 2. Kg1 Qh3 3. f3 Nxf3+ 4. Bxf3 Bxf3 5. Qd2 Qh1+ 6. Kf2 Qg2# ) 2... Qh3+ 3. Kg1 Nf3+ 4. Bxf3 Bxf3 5. Re2 Qh1+ 6. Kf2 Qg2+ 7. Ke1 Qxe2# 0-1