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
d1a4
d1b3
d1c2
d1b1
d1c1
d1d3
d1d2
e1g1
e1f1
e1d2
a1c1
a1b1
h1f1
h1g1
h1h3
h1h2
a2a4
a2a3
e2f4
e2c1
e2c3
e2g1
e2g3
f2f4
f2f3
g2g4
g2g3
e3c1
e3d2
e3h6
e3g5
e3f4
c4b3
c4a6
c4b5
c4d3
c4f7
c4e6
c4d5
d4d5
e4e5
h4h5

## Board State Fen
r1bq1rk1/pp2ppbp/6p1/n7/2BPP2P/4B3/P3NPP1/R2QK2R w KQ - 1 12
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
d1a4
d1b3
d1c2
d1b1
d1c1
d1d3
d1d2
e1g1
e1f1
e1d2
a1c1
a1b1
h1f1
h1g1
h1h3
h1h2
a2a4
a2a3
e2f4
e2c1
e2c3
e2g1
e2g3
f2f4
f2f3
g2g4
g2g3
e3c1
e3d2
e3h6
e3g5
e3f4
c4b3
c4a6
c4b5
c4d3
c4f7
c4e6
c4d5
d4d5
e4e5
h4h5

## Board State Fen
r1bq1rk1/pp2ppbp/6p1/n7/2BPP2P/4B3/P3NPP1/R2QK2R w KQ - 1 12
assistant
c4d3