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
a1b1
c1a3
c1b2
e1f1
e1e2
e1d1
g1f1
g1h1
g1g2
a2a4
a2a3
d2d3
h2h4
h2h3
f3f4
g3g4

## Board State Fen
r3k2r/p1p2ppp/8/8/3b4/5PP1/P2P1P1P/R1B1K1R1 w Qkq - 0 16
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
a1b1
c1a3
c1b2
e1f1
e1e2
e1d1
g1f1
g1h1
g1g2
a2a4
a2a3
d2d3
h2h4
h2h3
f3f4
g3g4

## Board State Fen
r3k2r/p1p2ppp/8/8/3b4/5PP1/P2P1P1P/R1B1K1R1 w Qkq - 0 16
assistant
a1b1