A beautiful case to show us how unlikely it is for humans to find the winning move in such not very (or extremely) complex position where a modern chess engine like Stockfish knows how to crush the opponent.
If you want to see how long it takes for your engine to find Rc6!!! you may use two links below to load the position on your GUI:
1) Insert FEN string: r4rk1/1b1p2pp/1p1b3q/pP1P1p2/8/P2Q1BP1/1BR2P1P/4R1K1 w - - 0 1
2) Import PGN file: HERE