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
h5h4
a6a5
d6d5
b7e4
b7d5
b7c6
b7c8
e7e5
e7f6
e7e6
g7g5
g7f6
g7g6
a8a7
b8c6
b8d7
d8a5
d8b6
d8c7
d8c8
d8d7
e8d7
h8g8
h8h6
h8h7

## Board State Fen
rn1qkb1r/1b2ppp1/p2p1B2/1p5p/3NP3/P1N5/1PP2PPP/R2QKBR1 b Qkq - 0 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
h5h4
a6a5
d6d5
b7e4
b7d5
b7c6
b7c8
e7e5
e7f6
e7e6
g7g5
g7f6
g7g6
a8a7
b8c6
b8d7
d8a5
d8b6
d8c7
d8c8
d8d7
e8d7
h8g8
h8h6
h8h7

## Board State Fen
rn1qkb1r/1b2ppp1/p2p1B2/1p5p/3NP3/P1N5/1PP2PPP/R2QKBR1 b Qkq - 0 9
assistant
g7f6