My Chess Life

IS THE POSITION EQUAL?

Position after 20.Rac1

The board (sorry I captured it from the side, just for fun) shows the current position in the duel between arkurni and iiumchessmaster which has been ongoing since 7th of December last year. The pieces and the pawns are completely equal, and there is no immediate attack for both sides. White, however, just positioned his rook to control the only open line. What is the best reply for Black?