Agree that Ba5 seems to be a hammer blow if allowed...
Seems "impossible" to get anything to work out well for white. I'm assuming this puzzle is VERY difficult to work out and as such likely to be well beyond my capability.
I won't get it if its really hard. A window on the level of my thought processes....
Queening the d pawn seems essential for white unless there is some mating net with bishop and knight possible - if the puzzle is really complex then it could involve queening the g pawn (but I can't work that...
I'm not very good but can see something to do with queening d pawn, and a fork on f7 and other checks available to black ...
Is Bb3 the right first move?
Yes, that’s what I think too. Unless anyone comes up with something better! [emoji23]
Seems a slightly tame result for a puzzle - but is intermediate sort of level so plenty of advantage...
With Rook on a1 somehow being significant...
Still struggling. Any chess players on the NSC weekday shift able to explain the full solution?
As mentioned by someone above then Ra8-g8 is also part of it?