The isolated Pawn casts gloom over the entire chessboard.
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[Event "U.S. Championship"]
[Site "?"]
[Date "2014.??.??"]
[Round "?"]
[White "Friedel, Joshua"]
[Black "Gareev, Timur"]
[Result "1-0"]
[Annotator "David Hayes"]
[BlackElo "0"]
[FEN "8/8/p4p2/P1K1k2p/1P2P1pP/6P1/3Nb3/8 w - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
1. Nb1 Kxe4 ( { Black can try: } 1... Bd3 2. Nc3 f5 3. exf5 Kxf5 4. b5 Bxb5 5. Nxb5 axb5 6. a6 Ke4 7. a7 Ke3 8. a8=Q { White wins with a large material
advantage. } ) 2. Nc3+ Ke3 3. Nxe2 Kxe2 4. b5 axb5 5. a6 Kf3 6. a7 Kxg3 7. a8=Q { White wins with a large material advantage. } 1-0