Know the ins and outs of how knights fight against passed pawns. Knights can either blockade a passed pawn, or attack it, but not both! If you're trying to promote a pawn, see if you can deflect the enemy knight using your own knight as bait. Knights are also notoriously bad at dealing with passed rook pawns, as they have less room to maneuver.
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[Event "rated untimed match"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "Unknown"]
[Black "Unknown411"]
[Result "0-1"]
[Annotator "David Hayes"]
[BlackElo "0"]
[FEN "8/2p5/1p6/p1kBp1p1/P1P3p1/2P3K1/8/8 b - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
1... b5 2. axb5 a4 3. Be4 a3 4. Bb1 Kxc4 5. Kxg4 Kxc3 6. Kxg5 Kb2 7. Be4 a2 8. Bd5 a1=Q { Black wins with a large material advantage. } 0-1