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
d5e4
d5d4
a6a5
f6e4
f6g4
f6h5
g6g5
b7c6
b7c8
c7c5
c7c6
d7c5
d7e5
d7b6
d7b8
d7f8
g7f8
g7h6
g7h8
h7h5
h7h6
a8a7
a8c8
a8b8
d8e7
d8b8
d8c8
e8e5
e8e6
e8e7
e8f8
g8h8
g8f8

## Board State Fen
r2qr1k1/1bpn1pbp/p4np1/1p1pP3/4P3/PPP2NNP/2B2PP1/R1BQR1K1 b - - 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
b5b4
d5e4
d5d4
a6a5
f6e4
f6g4
f6h5
g6g5
b7c6
b7c8
c7c5
c7c6
d7c5
d7e5
d7b6
d7b8
d7f8
g7f8
g7h6
g7h8
h7h5
h7h6
a8a7
a8c8
a8b8
d8e7
d8b8
d8c8
e8e5
e8e6
e8e7
e8f8
g8h8
g8f8

## Board State Fen
r2qr1k1/1bpn1pbp/p4np1/1p1pP3/4P3/PPP2NNP/2B2PP1/R1BQR1K1 b - - 0 17
assistant
d7e5