This was a position in a game I just played, I have black pieces. The move I played here was f6 but the top engine move (>10 eval points for black better than my move) just felt strange to me. I had to go in analysis mode and play it out several moves before I could see why it was good. Can you see the move?

Rxe3+ looks good here! I think you basically win the bishop with that, white can’t recapture with the king cause then you can check again with your other rook and that doesn’t look pleasant for white 😀

nice!

even Nd5 pressuring e3 may work? 

because the check on f7 isn't really that big of a threat

Correct! 😃

As I was playing my brain dismissed it as “trading rook for bishop bad” but after king takes the follow up as you say is Re8+. King has to move but Kf2 is only move that guards the rook on e1.

Now black can play Nd3+, forking the rook and king! This wins back rook for white so white is up a bishop.