Today I faced my toughest Chess problem since I started doing tactics problems again, at least by the problem’s rating. The problem was rated 1620.7. I was rated 1533.17. That gave me an estimated 37.7% chance of getting the correct answer. I got it.
The answer is R8xe5 (the lower black rook takes the white bishop). If the other rook takes the bishop, white can take back with his rook, and black is down the exchange (about 2 pawns). But taking with the 8th rank rook forces the recapture to be done with white’s queen. That puts black up queen and a bishop for two rooks (2 or 3 pawns depending on who you talk to).