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
c1b2
c1h6
c1g5
c1f4
c1e3
c1d2
a1b1
a1a2
d1a4
d1b3
d1c2
d1e2
d1e1
d1d2
f1e1
f1f2
g1h1
g1f2
g2g4
g2g3
h2h4
h2h3
a3a4
d3b1
d3c2
d3e2
f3f4
c4d5
e4d5
e4e5

## Board State Fen
r1bqr1k1/p4ppp/2p2n2/2pp4/2P1P3/P1PB1P2/6PP/R1BQ1RK1 w - - 0 16
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
c1b2
c1h6
c1g5
c1f4
c1e3
c1d2
a1b1
a1a2
d1a4
d1b3
d1c2
d1e2
d1e1
d1d2
f1e1
f1f2
g1h1
g1f2
g2g4
g2g3
h2h4
h2h3
a3a4
d3b1
d3c2
d3e2
f3f4
c4d5
e4d5
e4e5

## Board State Fen
r1bqr1k1/p4ppp/2p2n2/2pp4/2P1P3/P1PB1P2/6PP/R1BQ1RK1 w - - 0 16
assistant
c4d5