If its white to move 1.Rd6+ winning the bishop.
If its black to move? Pretty much anything isn't good.
1...Rd6 guarding against the check. 2.Rd5 And that's a mess of a pawn structure for black.
1...d4 Loses a pawn, but what else? 2.Rd6+ And the a-pawn advances.
I always get curious when someone uses terms like: "theoretical draw" White has every advantage in the world in this position.
More active rook.
Better bishop.
Better pawn structure.
Passed pawn.
Can't believe I overlooked this, as often as I try to pull it when I'm losing. Club game, roughly equal (slightly stronger) opponent:
The endgame played out to a draw where black gave up his bishop for the last of my pawns, but even if I could have held onto the a-pawn, it's still a draw because I have the wrong bishop for it! As a result, I let the rooks come off thinking I could force the bishops off and clean up the kingside when he took the a-pawn, not realizing the real action would be on the kingside!
I think this position is already a theoretical draw, but I'd appreciate any analysis.