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
a5b4
a5a4
e5e4
f5f4
b7b5
b7b6
d7c5
d7b6
d7b8
d7f6
e7d8
e7h4
e7g5
e7f6
e7e6
e7g7
e7f7
h7h5
h7h6
a8a6
a8a7
a8d8
a8c8
a8b8
e8c8
e8f7
e8d8
f8h6
f8g7
h8g8

## Board State Fen
r3kb1r/1p1nq2p/3p4/p2Ppp2/1P6/6QP/2P2PP1/1RB1RBK1 b kq - 0 19
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
a5b4
a5a4
e5e4
f5f4
b7b5
b7b6
d7c5
d7b6
d7b8
d7f6
e7d8
e7h4
e7g5
e7f6
e7e6
e7g7
e7f7
h7h5
h7h6
a8a6
a8a7
a8d8
a8c8
a8b8
e8c8
e8f7
e8d8
f8h6
f8g7
h8g8

## Board State Fen
r3kb1r/1p1nq2p/3p4/p2Ppp2/1P6/6QP/2P2PP1/1RB1RBK1 b kq - 0 19
assistant
a5a4