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
e5d4
b6a4
b6a8
b6c4
b6c8
b6d5
b6d7
d6d5
f6e4
f6g4
f6d5
f6d7
f6h5
b7a6
b7a8
b7e4
b7d5
b7c6
b7c8
c7c5
c7c6
g7f8
g7h6
g7h8
h7h5
h7h6
d8e7
d8a8
d8b8
d8c8
d8d7
e8e6
e8e7
e8f8
g8h8
g8f8

## Board State Fen
3qr1k1/1bp2pbp/1n1p1np1/1p2p1B1/3PP3/2PB1NNP/1P3PP1/Q3R1K1 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
e5d4
b6a4
b6a8
b6c4
b6c8
b6d5
b6d7
d6d5
f6e4
f6g4
f6d5
f6d7
f6h5
b7a6
b7a8
b7e4
b7d5
b7c6
b7c8
c7c5
c7c6
g7f8
g7h6
g7h8
h7h5
h7h6
d8e7
d8a8
d8b8
d8c8
d8d7
e8e6
e8e7
e8f8
g8h8
g8f8

## Board State Fen
3qr1k1/1bp2pbp/1n1p1np1/1p2p1B1/3PP3/2PB1NNP/1P3PP1/Q3R1K1 b - - 0 19
assistant
c7c6