Level 4 - Two Puzzles here

Find the best move for Black.

The solution - Can you check if black rook could capture the knight. If white queen captures the rook, then Nf3+ forking King, Queen and Rook.

The real game is showed here - http://www.chessgames.com/perl/chessgame?gid=1245184

After couple of moves,  the game is shown here...

Find the best move for black