1. ..
Qa1+ 2.
Kg2 Qxa3? Black hopes still to have time to grab a pawn. 3.
Rc2 Qb4 (wants now also the pawn on e4) 4.
Qf5 {defense and attack}
Rf8 5.
Rc7 Qa4 ('protecting' d7; better was 5. ...
Qb5 6.
Rxf7 Rxf7 7.
Qxf7+ Kd8 8.
Qf6+ Kc7 9.
Qe7+ Kb8 (9. ...
Qd7 10.
Rc2+ Kb8 11.
Qxd7) 10.
Qxd6+ Ka7 11.
Qxe5 with big advantage for White)(5. ...
Rd8? 6.
Rxf7 Rxf7 7.
Qxf7#) 6.
Rxf7 Rxf7 7.
Qxf7+ Kd8 8.
Qf6+ Kc8 (not better is 8. ...
Ke8 9.
Qe6+ Kd8 10.
Qxd6+ Qd7 11.
Rf8#) 9.
Qe6+ Kc7 10.
Qe7+ Kb6 (10. ...
Kb8 11.
Qxd6+ Ka7 12.
Qc5+ b6 13.
Qc7# loses too (or 12. ...
Kb8 13.
Rf8+ Qe8 14.
Rxe8# with one move more resistance)) 11.
Rb2+ Kc5 (11. ...
Qb5 12.
Qxd6+ Ka7 13.
Rxb5 axb5 and White will also win soon) 12.
Qc7+ Kd4 13.
Rd2+ Kxe4 14.
Qh7+ Ke3 15.
Qd3# (or 13. ...
Ke3 14.
Qc3+ Kxe4 15.
Qd3#)