Solution of yesterday's study!

I have to go tomorrow, so I cannot leave you with your "eyes in the sun" (roumanian expression). That means I am gonna write down the solution for the chess problem I posted yesterday, which gives me a very nice feeling, the study is really great!
It all starts here:

We start with 1.Nf6! Kg7
Forced, since 1...Kg6 2.Bh5+ allows White to control f7-square and savely queen on the next move.
2.Nh5+ Kg6
Again forced, 2...Kh7 allows White promotion: 3.Bc2+ Kg8 4.d8Q winning.
3.Bc2+! Kxh5

So White just gave up his knight, what could be the point?
4.d8Q! Nf7+
Isn't this going all wrong for White? First giving up the knight and now losing his only tool; the d-pawn?
5.Ke6! Nxd8+
6.Kf5!

Altough losing most of his material White did manage in cornering the Black king.
First of all Black has to prevent a looming mate on d1!
6...e2 forced!
7.Be4 Threatening mate, this time on f3.
7...e1N! Only move, preventing the mate. I cannot stop smiling, 3 black knights on the board!
8.Bd5!!

This is what I like most from the whole study: a quiet but very strong manoeuvre, planning to go to c4 and e2 mate! Look at those helpless knights!
8...c2 9.Bc4 Deja vu? Threatening mate on e2, and there is only one way to prevent it :)
9...c1N :))) and another Black knight on the board! number 4!

The Bishop just keeps dancing!
10.Bb5! Nc7 preventing mate on e8
11.Ba4 White's bishop is dominating the entire board and mate is now unavoidable, the knights are spectators, unable to save their King!
THE END! I loved how White's bishop confused all Black's pieces!