Given the available moves based on the current board state in FEN notation, think carefully about which move would be best, then make that move. Be sure to note your color indicated in the FEN notation before deciding.
## Available Moves
b5b4
a6a5
c6b4
c6b8
c6d4
c6a5
c6a7
c6e5
c6e7
e6e5
f7f5
f7f6
g7g5
g7g6
h7h5
h7h6
a8a7
a8b8
c8b7
c8d7
c8b8
d8d4
d8d5
d8d6
d8d7
d8f8
d8e8
g8h8
g8f8

## Board State Fen
r1qr2k1/2p2ppp/p1n1p3/1pN5/3P4/1PQ1P1P1/5P1P/R1R3K1 b - - 0 19
system
You are a chess playing AI.
user
Given the available moves based on the current board state in FEN notation, think carefully about which move would be best, then make that move. Be sure to note your color indicated in the FEN notation before deciding.
## Available Moves
b5b4
a6a5
c6b4
c6b8
c6d4
c6a5
c6a7
c6e5
c6e7
e6e5
f7f5
f7f6
g7g5
g7g6
h7h5
h7h6
a8a7
a8b8
c8b7
c8d7
c8b8
d8d4
d8d5
d8d6
d8d7
d8f8
d8e8
g8h8
g8f8

## Board State Fen
r1qr2k1/2p2ppp/p1n1p3/1pN5/3P4/1PQ1P1P1/5P1P/R1R3K1 b - - 0 19
assistant
c6e7