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
c5d4
c5c4
a6a5
e6e5
f6e4
f6g4
f6g8
f6d5
f6d7
f6h5
g7g5
g7g6
h7h5
h7h6
a8a7
b8c6
b8d7
c8b7
c8d7
d8a5
d8b6
d8c7
d8e7
d8d4
d8d5
d8d6
d8d7
e8e7
e8d7
f8d6
f8e7
h8g8

## Board State Fen
rnbqkb1r/5ppp/p3pn2/1pp5/3P4/2N1PN2/PP2BPPP/R1BQ1RK1 b kq - 1 9
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
c5d4
c5c4
a6a5
e6e5
f6e4
f6g4
f6g8
f6d5
f6d7
f6h5
g7g5
g7g6
h7h5
h7h6
a8a7
b8c6
b8d7
c8b7
c8d7
d8a5
d8b6
d8c7
d8e7
d8d4
d8d5
d8d6
d8d7
e8e7
e8d7
f8d6
f8e7
h8g8

## Board State Fen
rnbqkb1r/5ppp/p3pn2/1pp5/3P4/2N1PN2/PP2BPPP/R1BQ1RK1 b kq - 1 9
assistant
b8d7