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
a6a5
d6d5
f6e7
f6h4
f6g5
g6f4
g6h4
g6h8
g6e7
c7c5
c7c6
d7c6
d7c8
d7h3
d7g4
d7f5
d7e6
d7e8
h7h5
h7h6
b8a8
b8b6
b8b7
b8c8
d8e7
d8c8
d8e8
f8e8
g8h8

## Board State Fen
1r1q1rk1/2pb1ppp/p2p1bn1/1p2p3/PP2P3/1B1PBN2/2P2PPP/R2Q1RK1 b - - 0 15
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
a6a5
d6d5
f6e7
f6h4
f6g5
g6f4
g6h4
g6h8
g6e7
c7c5
c7c6
d7c6
d7c8
d7h3
d7g4
d7f5
d7e6
d7e8
h7h5
h7h6
b8a8
b8b6
b8b7
b8c8
d8e7
d8c8
d8e8
f8e8
g8h8

## Board State Fen
1r1q1rk1/2pb1ppp/p2p1bn1/1p2p3/PP2P3/1B1PBN2/2P2PPP/R2Q1RK1 b - - 0 15
assistant
b5a4