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
b1a3
b1c3
d1e2
d1e1
f1e1
g1h1
a2a3
b2b4
b2b3
c2c4
c2c3
d2d4
d2d3
g2g4
g2g3
h2h4
h2h3
f3e1
f3e5
f3g5
f3d4
f3h4
a4b3
a4c6
a4b5

## Board State Fen
r1bqk2r/1pppbppp/p1n2n2/4p3/B3P3/5N2/PPPP1PPP/RNBQ1RK1 w kq - 4 6
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
b1a3
b1c3
d1e2
d1e1
f1e1
g1h1
a2a3
b2b4
b2b3
c2c4
c2c3
d2d4
d2d3
g2g4
g2g3
h2h4
h2h3
f3e1
f3e5
f3g5
f3d4
f3h4
a4b3
a4c6
a4b5

## Board State Fen
r1bqk2r/1pppbppp/p1n2n2/4p3/B3P3/5N2/PPPP1PPP/RNBQ1RK1 w kq - 4 6
assistant
a4c6