Get closer to the endgame. With fewer pieces left in the position, the dominance of the two bishops can really be felt, as they can control both sides of the board at once. If the enemy knight doesn't have a secure outpost to use, it can find itself passive and restricted in its own territory.
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[Event "rated untimed match"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "Unknown"]
[Black "Unknown465"]
[Result "0-1"]
[Annotator "David Hayes"]
[BlackElo "0"]
[FEN "rn3rk1/ppb2ppb/2pq1n2/3p1PPp/3P4/1PN1P2P/PB2N1B1/R2Q1RK1 b - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
1... Qh2+ 2. Kf2 Ng4+ 3. hxg4 ( { White can try: } 3. Ke1 Nxe3 4. Qd3 Nxg2+ 5. Kd1 Nh4 { Black wins with a large material advantage. } ) 3... Qh4+ 4. Kg1 ( { White
can try: } 4. Ng3 Qxg3+ 5. Ke2 Qxg2+ 6. Rf2 Qxg4+ 7. Kd2 Bxf5 8. Rxf5 Qxf5 9. Qxh5 Nd7 10. Rh1 f6 11. g6 Qxh5 12. Rxh5 f5 { Black wins with a large material
advantage. } ) 4... Bh2+ 5. Kh1 Bg3+ 6. Kg1 Qh2# 0-1