2023/12/06 DPA: "Incremental Solution"

Black obviously wants to play ... bxa6 but then White plays Qxa8.

If Black can figure out how to move his QB with a threat, say to the Queen or King, then White will have to deal with that threat and Black will be free to capture the Bishop because, by moving his Bishop, Black has allowed the Queen to defend the Rook.

Black could play 1. ... Bg4  2. hxg4 bxa6, but that's just an even exchange and positionally, Black is worse [thanks to @JMp1916lj for pointing out my error in stating this won the exchange].

What about 1. ... e4 - instead of trying to defend the Rook by moving the QB, Black blocks the a8-h1 diagonal.  But that allows 2. Nxe4 and if 2. ... bxa6  3. Nxf6+ and the Rook is again hanging.

So eliminate the Knight first:  1. Bxc3.  If the Queen recaptures, the Queen is no longer threatening the Rook so Black is free to play 2. ... bxa6.

If either pawn recaptures, 2. ... e4 

and White can choose between 2 losing lines:  3. Rxe4 Nxe4 or 3. Qg3 bxa6.  Stockfish favors 3. Qe3:

The solution chose 3. Qg3 bxa6.  Note White has the scary-looking 4. Bh6, threatening 5. Qxg7# but Black can counter with either 4. ... Ne8 or even Nh5.

This thought process shows how one can back into the solution by eliminating problems serially but backwards:  I first identified what was wrong with the immediate 1. ... bxa6, then saw the problem with 1. ... e4, and once I figured out Black had to capture the Knight first, my solution was already in place.

I also didn't allow the appearance of new problems deter me from pursuing that line of thought.

Of course, a better player would be able to see everything from the beginning instead of the end.