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
b4a2
b4a6
b4c2
b4c6
b4d3
b6b5
e6e5
f6d4
f6e5
f6e7
f6h4
f6g5
g7g5
g7g6
h7h5
h7h6
a8a6
a8a7
a8b8
c8a6
c8b7
c8d7
d8c7
d8e7
d8d6
d8d7
d8e8
f8e8
g8h8

## Board State Fen
r1bq1rk1/5ppp/1p2pb2/p2p4/Pn1P1P2/1P3N2/N4PPP/1BRQR1K1 b - - 1 16
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
b4a2
b4a6
b4c2
b4c6
b4d3
b6b5
e6e5
f6d4
f6e5
f6e7
f6h4
f6g5
g7g5
g7g6
h7h5
h7h6
a8a6
a8a7
a8b8
c8a6
c8b7
c8d7
d8c7
d8e7
d8d6
d8d7
d8e8
f8e8
g8h8

## Board State Fen
r1bq1rk1/5ppp/1p2pb2/p2p4/Pn1P1P2/1P3N2/N4PPP/1BRQR1K1 b - - 1 16
assistant
b4a2