notyetagm: White has just played 31 d3-d4.
Black to play: 31 ... ?
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<Here, L'Ami clinched the game by 31...Qxf2+! 32.Qxf2 Rxf2, when 33.Kxf2 is impossible because of 33...b2, when the pawn queens.> Position after 31 ... f6xf2+! 32 b2x f2 f8x f2
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 click for larger viewAnd now the whole point of Black's play is that 33 g1x f2?? allows 33 ... b3-b2 and the passed b-pawn queens. (VAR) Position after 33 g1x f2?? b3-b2
 click for larger viewSo l'Ami (Black) was able to win a pawn and get his rook onto the 7th rank because he was tactically alert enough to spot the <PASSED PAWN VERSUS ROOK TRICK>, the Black b3-passer versus the White a7-rook on the adjacent a-file. Note how the doubled Black b4-pawn here serves the valuable purpose of <SHIELDING> the front b-file passer so that the maneuvre a7-b7 does not threaten the front doubled passed pawn. |