I am trying to understand this position a bit better and would appreciate some help in doing so. I am black and it's my turn...
I played the move
..c5. I don't have a deep understanding of this specific position, hence my question (I'm ELO 1700) but my thoughts were along the lines of preventing white to get
Bb4 in and at the same time gaining a tempo by kicking the knight. This then also allows me to bring my knight back into the game without obstructing any of my rooks.
For some reason this move was extremely bad (listed as the 10th best move with a relative score of 2.0 points lower than the best move)
Can someone please explain to me why this move is so bad?
[title "Black to play"] [fen "1n1qr1k1/pr3ppp/2p2b2/8/2PN1Q2/2BP2P1/PP2PP1P/3R1RK1 b - - 0 20"] 1... c5