If your opponent cannot do anything active, then don't rush the position; instead you should let him sit there, suffer, and beg you for a draw.
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[Event "rated untimed match"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "Unknown"]
[Black "Unknown393"]
[Result "1-0"]
[Annotator "David Hayes"]
[BlackElo "0"]
[FEN "8/1b3pk1/4p1p1/1Q1p4/p2Pn3/P1P3Pq/1P3P2/1B3RK1 b - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
1... Nf6 2. Qe2 ( { White dare not try: } 2. Qxb7 Ng4 3. Re1 Qh2+ 4. Kf1 Qxf2# ) ( { White can try: } 2. f3 Qxg3+ 3. Kh1 Nh5 4. f4 Qh4+ 5. Kg2 Qg4+ 6. Kf2 Qxf4+ 7. Ke1 Qc1+ 8. Kf2 Qd2+ 9. Qe2 Qxe2+ 10. Kxe2 Ng3+ 11. Kf2 Nxf1 12. Kxf1 { Black wins with a large material advantage. } ) 2... Ng4 3. f3 Ba6 4. Qg2 Qxg2+ 5. Kxg2 Ne3+ 6. Kf2 Nxf1 { Black wins with a large material advantage. } 1-0