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
a1e1
a1d1
a1c1
a1b1
f1b1
f1c1
f1d1
f1e1
f1g1
h1g1
a2a3
b2b3
c2c4
c2c3
f2f4
f2f3
g2g4
g2g3
h2h4
h2h3
d3a6
d3b5
d3c4
d3e2
a4b6
a4c3
a4c5
b4a3
b4a5
b4e1
b4d2
b4c3
b4d6
b4c5
b4b3
b4d4
b4c4
b4b7
b4b6
b4b5

## Board State Fen
r3k2r/1p3ppp/p1qpbn2/4p3/NQ2P3/3B4/PPP2PPP/R4R1K w kq - 4 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
a1e1
a1d1
a1c1
a1b1
f1b1
f1c1
f1d1
f1e1
f1g1
h1g1
a2a3
b2b3
c2c4
c2c3
f2f4
f2f3
g2g4
g2g3
h2h4
h2h3
d3a6
d3b5
d3c4
d3e2
a4b6
a4c3
a4c5
b4a3
b4a5
b4e1
b4d2
b4c3
b4d6
b4c5
b4b3
b4d4
b4c4
b4b7
b4b6
b4b5

## Board State Fen
r3k2r/1p3ppp/p1qpbn2/4p3/NQ2P3/3B4/PPP2PPP/R4R1K w kq - 4 15
assistant
a4b6