1.Qg2!!! – White attacks the pawn, forcing Black to

place a queen!

1…b1Q 2.Qa8+! Kb4 3.Qa5+! Kc4 4.Qc5+! Kd3

5.Qf5+!

And the white queen originally wins against the queen and the bishop

1… Ka3 2.Qa8+! Kb4 3.Qa5+! Kc4 4.Qe5!! -  White

attacks the pawn again, forcing Black to place a queen!

(4.Qf5? Kc3! =)

4…b1Q 5.Qc5+! Kd3 6.Qf5+!

(2… Ba4 3.Qe4! Kb3 4.Kc5! - and win,

for example:

4… Bd7 5.Qc4+ Ka3 6.Qc2 Ba4

7.Qc3+ Ka2 8.Qd2 Ka1 9.Qd4 Bc2 10.Kb4 Ka2

11.Qa7+ Kb1 12.Ka3 Kc1 13.Qe3+ Kb1

14.Qe1+ Bd1 15.Q*d1#)   

1.Qe5?/Qc3? ~ 2.Qa5#

1… Ka3! 2.Qc5+ Ka2! 3.Qa5+ Kb1! 4.Qd2 Ka1!

5.Qc3 Ka2! 6.Qa5+ Kb1 7.Kb5 Kc2! 8.Qc7+ Kd2/Kd1 =

1.Qg7? Ka3! 2.Qa7+ Ba4! =

White has a lot of opportunities to immediately attack the b1-square or to prevent the appearance of the black queen. But, they choose a paradoxical move -

who, on the contrary, precisely encourages the appearance of the black queen and in the rare ending the queen against the queen and the bishop, find the original win.