A fascinating zugzwang puzzle

It's White's move. Try to find the forced way of winning.

source: video "Roman's Lab #15", part 3

2N2q2/2p3p1/6p1/p7/k1p4Q/8/K7/8 w - - 0 1

To see the solution, click on the link below.

1.Qxc4+ Qb4 2.Nb6+ cxb6 3.Qd3! Black is now in a zugzwang position. 3...g5 [3...Qc5 4.Qb3#;
3...Qb5 4.Qa3#;
3...b5 4.Qc2+ Qb3+ 5.Qxb3#] 4.Qd7+ Qb5 [4...b5 5.Qd1+ Qb3+ 6.Qxb3#] 5.Qd4+ Qb4 6.Qd3 g4 7.Qd7+ Qb5 8.Qxg4+ Qb4 9.Qd7+ Qb5 10.Qd4+ Qb4 11.Qd3 g6 12.Qd7+ Qb5 13.Qd4+ Qb4 14.Qd3 g5 15.Qd7+ Qb5 16.Qd4+ Qb4 17.Qd3 g4 18.Qd7+ Qb5 19.Qxg4+ Qb4 20.Qd7+ Qb5 21.Qd4+ Qb4 22.Qd3 Black must make a move, but whatever they choose, the Queen falls, and checkmate comes. 1-0