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
a1a3
a1a2
d1e2
d1b1
d1c1
d1d8
d1d7
d1d6
d1d5
d1d4
d1d3
d1d2
e1f1
e1e3
e1e2
g1h2
g1h1
g1f1
b2a3
b2c1
g2g4
g2g3
b3b4
c3b1
c3b5
c3d5
c3a2
c3e2
f3e5
f3g5
f3d2
f3d4
f3h2
f3h4
h3h4
a4b5
a4a5

## Board State Fen
2rqrbk1/5pp1/pnp2n1p/1p2p3/P3P3/1PN2N1P/1BP2PP1/R2QR1K1 w - - 0 20
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
a1a3
a1a2
d1e2
d1b1
d1c1
d1d8
d1d7
d1d6
d1d5
d1d4
d1d3
d1d2
e1f1
e1e3
e1e2
g1h2
g1h1
g1f1
b2a3
b2c1
g2g4
g2g3
b3b4
c3b1
c3b5
c3d5
c3a2
c3e2
f3e5
f3g5
f3d2
f3d4
f3h2
f3h4
h3h4
a4b5
a4a5

## Board State Fen
2rqrbk1/5pp1/pnp2n1p/1p2p3/P3P3/1PN2N1P/1BP2PP1/R2QR1K1 w - - 0 20
assistant
d1d8