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
c6b4
c6d4
c6a5
c6a7
c6e5
e7h4
e7g5
e7f6
e7f8
g7g5
g7g6
h7h5
h7h6
b8a8
b8b6
b8b7
b8c8
d8a5
d8b6
d8c7
d8c8
d8d7
e8f8
g8h8
g8f8

## Board State Fen
1r1qr1k1/4bppp/2np4/1p1Q4/4p3/4B3/PP2BPPP/2RR2K1 b - - 0 20
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
c6b4
c6d4
c6a5
c6a7
c6e5
e7h4
e7g5
e7f6
e7f8
g7g5
g7g6
h7h5
h7h6
b8a8
b8b6
b8b7
b8c8
d8a5
d8b6
d8c7
d8c8
d8d7
e8f8
g8h8
g8f8

## Board State Fen
1r1qr1k1/4bppp/2np4/1p1Q4/4p3/4B3/PP2BPPP/2RR2K1 b - - 0 20
assistant
c6b4