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
a1a8
a1a7
a1a6
a1a5
a1a4
a1a3
a1a2
b2b3
c2b1
c2a4
c2b3
c2d3
c1h6
c1g5
c1f4
c1e3
c1d2
c3b4
c3c4
g1h2
g1h1
g1f1
f3e1
f3e5
f3g5
f3d2
f3d4
f3h2
f3h4
g3f1
g3f5
g3h1
g3h5
g3e2
h3h4

## Board State Fen
1rb1rbk1/2p2pp1/2n2n1p/4p3/1p2P3/2P2NNP/1PB2PP1/R1BR2K1 w - - 0 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
d1f1
d1e1
d1d8
d1d7
d1d6
d1d5
d1d4
d1d3
d1d2
a1b1
a1a8
a1a7
a1a6
a1a5
a1a4
a1a3
a1a2
b2b3
c2b1
c2a4
c2b3
c2d3
c1h6
c1g5
c1f4
c1e3
c1d2
c3b4
c3c4
g1h2
g1h1
g1f1
f3e1
f3e5
f3g5
f3d2
f3d4
f3h2
f3h4
g3f1
g3f5
g3h1
g3h5
g3e2
h3h4

## Board State Fen
1rb1rbk1/2p2pp1/2n2n1p/4p3/1p2P3/2P2NNP/1PB2PP1/R1BR2K1 w - - 0 18
assistant
c2a4