Here a nice ending from Rd4

Black played solidly from the opening and did nothing special. The game was equal but white should not have allowed a queen trade.

Nagy,Ga(HUN 2408) – Anton Guijarro,D (2559) [D63]
WY BU18 2012 Maribor SLO (4), 11.11.2012
The position looks equal but it is not. How should black continue?

Black to Play