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
a6a5
b7d5
b7c6
b7c8
f7f5
f7f6
g7g5
g7g6
h7h5
h7h6
a8a7
a8c8
a8b8
d8a5
d8b6
d8c7
d8b8
d8c8
d8d7
e8d7
h8g8

## Board State Fen
r2qkb1r/1b2nppp/p2p4/1p1P4/P4PP1/7P/1PP2QB1/R1B1R1K1 b kq a3 0 17
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
a6a5
b7d5
b7c6
b7c8
f7f5
f7f6
g7g5
g7g6
h7h5
h7h6
a8a7
a8c8
a8b8
d8a5
d8b6
d8c7
d8b8
d8c8
d8d7
e8d7
h8g8

## Board State Fen
r2qkb1r/1b2nppp/p2p4/1p1P4/P4PP1/7P/1PP2QB1/R1B1R1K1 b kq a3 0 17
assistant
h7h5