I will admit I only looked very briefly, but Bh6 looks good to me. The threat is a simple Qg3, for now, but the main point is of course to let the a1 rook come to f1. The only semi decent candidate moves I can spot for black are 1... gxh6 and 1... Bh4. If 1... Bf6 2. Rxf6 wins on the spot, if 1... Bd6 then 2. Nxf7 and 3. Rf1, while anything else allows Qg3 with at least some material gain.

So, if 1... Bh4, I don't think immediate Rxf7 works. 2. Rxf7 Rxf7 3. Rf1 Bf6 4. Rxf6 gxf6 5. Qg3+ Kh8 6. Nxf7+ Qxf7 and we have nothing.

We also don't really wanna play 2. g3, since in may lines that square is needed for the Queen. However, if 2. g3 Bf6 3. Rxf6 is winning for white, which it probably is, we might also play 2. g3 in this line. However, I think a simple 2. Rf4 is also quite enough to gain a winning advantage, so 1... Bh4 is not very scary.

So if 1... gxh6, now I think 2. Rxf7 Rxf7 3. Rf1 is lethal (2. Nxf7 might also be enough actually)... This is where black has many possibilities, but on general feel I think it is impossible for him to defend against all the threats, and therefore I am not calculating any further.

Yeah I saw Bh6 pretty quickly, wasn't sure about exact followup, Rxf7 and Raf1 both looked pretty good.

Engine analysis follows: