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
d1f1
d1e1
d1d8
d1d7
d1d6
d1d5
d1d4
d1d3
d1d2
a1b1
a1a4
a1a3
a1a2
g1h1
g1f1
b2b4
b2b3
c1h6
c1g5
c1f4
c1e3
c1d2
g2g4
g2g3
h2h4
h2h3
c3b1
c3b5
c3d5
c3a2
c3a4
c3e2
f3e1
f3e5
f3g5
f3d2
f3d4
f3h4
c4a2
c4b3
c4a6
c4b5
c4f1
c4e2
c4d3
c4e6
c4d5
a5a6

## Board State Fen
r2nk2r/pp3nbp/2p1bpp1/P3p3/2B1P3/2N2N2/1PP2PPP/R1BR2K1 w kq - 1 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
d1f1
d1e1
d1d8
d1d7
d1d6
d1d5
d1d4
d1d3
d1d2
a1b1
a1a4
a1a3
a1a2
g1h1
g1f1
b2b4
b2b3
c1h6
c1g5
c1f4
c1e3
c1d2
g2g4
g2g3
h2h4
h2h3
c3b1
c3b5
c3d5
c3a2
c3a4
c3e2
f3e1
f3e5
f3g5
f3d2
f3d4
f3h4
c4a2
c4b3
c4a6
c4b5
c4f1
c4e2
c4d3
c4e6
c4d5
a5a6

## Board State Fen
r2nk2r/pp3nbp/2p1bpp1/P3p3/2B1P3/2N2N2/1PP2PPP/R1BR2K1 w kq - 1 15
assistant
c4e2