White could mate quickly by 1.Qg3 and 2.Qg7 except
that Black's pesky bishop gets in the way with 1...Bg6. So
White's idea is to interfere with the d3-bishop's access to g6...
1.Ne4
Now if 1...dxe4 2.Qg3 mate
Variation Diagram: After 2.Qg3 mate
So...
1...Bxe4 2.Rexe4
Variation Diagram: After 2.Rexe4
...and once again the threat of Qg3 (or g4) mate
forces Black's hand, even though it is just to delay the inevitable:
2...Qxf6 3.Qxf6 dxe4 4.Rxe4 h5 5.Qg5+ Kh7 6.Qxh5+ Kg7 7.Qg5+ Kh7 8.Rh4
mate. It's really a sad state of affairs when the best one has
is...
1...Qxf6
2.Nxf6+ Kh8
2...Kg7 3.Nh5+ Kh6 (alternatives mate even faster)
4.Qf6+ Bg6 5.Rh4 and Black cannot avoid mate. In this line if
4...Kxh5 5.g4 (or 5.Rh4) mate.
3.Qxd3 e4 4.Qxd5 Re6
Here Herr Fritz claims a mate-in-twelve. Have fun!