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
b5a4
b5b4
g5c1
g5d2
g5e3
g5f4
g5f6
g5h4
g5h6
a6a5
e7d5
e7f5
e7c6
e7g6
e7g8
f7f5
f7f6
g7g6
h7h5
h7h6
a8a7
a8b8
c8b7
c8h3
c8g4
c8f5
c8e6
c8d7
d8a5
d8b6
d8c7
d8d7
e8g8
e8f8
e8d7
h8f8
h8g8

## Board State Fen
r1bqk2r/4nppp/p2p4/1p1Np1b1/P3P3/2P5/1PN2PPP/R2QKB1R b KQkq a3 0 13
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
b5a4
b5b4
g5c1
g5d2
g5e3
g5f4
g5f6
g5h4
g5h6
a6a5
e7d5
e7f5
e7c6
e7g6
e7g8
f7f5
f7f6
g7g6
h7h5
h7h6
a8a7
a8b8
c8b7
c8h3
c8g4
c8f5
c8e6
c8d7
d8a5
d8b6
d8c7
d8d7
e8g8
e8f8
e8d7
h8f8
h8g8

## Board State Fen
r1bqk2r/4nppp/p2p4/1p1Np1b1/P3P3/2P5/1PN2PPP/R2QKB1R b KQkq a3 0 13
assistant
b5a4