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
a1a6
a1a5
a1a4
a1a3
a1a2
c1a3
c1b2
d1a4
d1b3
d1c2
d1e2
e1f1
e1e3
e1e2
g1h2
g1h1
g1f1
d2c4
d2b1
d2b3
d2f1
g2g4
g2g3
c3c4
d3b1
d3c2
d3b5
d3c4
d3f1
d3e2
f3e5
f3g5
f3d4
f3h2
f3h4
h3h4

## Board State Fen
2rqrbk1/1b3ppp/pn1p1n2/1p1Pp3/1P2P3/2PB1N1P/3N1PP1/R1BQR1K1 w - - 1 18
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
a1a6
a1a5
a1a4
a1a3
a1a2
c1a3
c1b2
d1a4
d1b3
d1c2
d1e2
e1f1
e1e3
e1e2
g1h2
g1h1
g1f1
d2c4
d2b1
d2b3
d2f1
g2g4
g2g3
c3c4
d3b1
d3c2
d3b5
d3c4
d3f1
d3e2
f3e5
f3g5
f3d4
f3h2
f3h4
h3h4

## Board State Fen
2rqrbk1/1b3ppp/pn1p1n2/1p1Pp3/1P2P3/2PB1N1P/3N1PP1/R1BQR1K1 w - - 1 18
assistant
c1b2