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 "Unknown87"]
[Result "1-0"]
[Annotator "David Hayes"]
[BlackElo "0"]
[FEN "3r1rk1/1p3pp1/4b2p/p1q5/Q7/2P5/PP4PP/1B2RR1K w - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
1. Qc2 g6 ( { Black can try: } 1... Rfe8 2. Qh7+ Kf8 3. Qh8+ Ke7 4. Qxg7 Kd7 5. Qxh6 Kc7 6. h3 { White wins with a large material advantage. } ) 2. Rxe6 fxe6 ( { Black can try: } 2... Qc7 3. Ref6 Qe7 4. Qb3 Rde8 5. Rxg6+ Kh8 6. Rxh6+ Kg7 7. Rh7+ Kg8 8. Qc4 Qe6 9. Qh4 f5 10. Rh8+ Kf7 11. Bxf5 Rxh8 12. Bxe6+ Kxe6 13. Qc4+ { White wins with a large material advantage. } 13... Kd6 { White
wins with a large material advantage. } ) 3. Qxg6+ Kh8 4. Qh7# 1-0