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
a1c1
a1b1
d1b1
d1c1
d1f1
d1e1
g1h1
g1f1
a2a4
a2a3
d2c1
d2c3
d2e1
d2b2
d2c2
e2f1
e2h5
e2g4
e2f3
f2f4
f2f3
g2g4
g2g3
h2h4
h2h3
d3d4
e3e4
b4a5
b4b5

## Board State Fen
r4rk1/4nppp/1ppq4/p2p4/1P6/3PP3/P2QBPPP/R2R2K1 w - a6 0 22
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
a1c1
a1b1
d1b1
d1c1
d1f1
d1e1
g1h1
g1f1
a2a4
a2a3
d2c1
d2c3
d2e1
d2b2
d2c2
e2f1
e2h5
e2g4
e2f3
f2f4
f2f3
g2g4
g2g3
h2h4
h2h3
d3d4
e3e4
b4a5
b4b5

## Board State Fen
r4rk1/4nppp/1ppq4/p2p4/1P6/3PP3/P2QBPPP/R2R2K1 w - a6 0 22
assistant
a2a3