I have played a game against a computer and came to the following position:
[Title "Black to move"] [StartFlipped "1"] [fen "3q2k1/pp1r1p1p/2p1p1p1/2Pr2P1/P2P1P2/4Q3/1P1R3P/3R2K1 b - - 0 1"]
I gave my best to capitalize, but in the end game was spectacularly drawn (3 queens were on the board at some point, but I have managed to save myself with perpetual check).
I feel sad because I believe that Black should be able to win the game from the position above.
Can you demonstrate a winning plan from this position?