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
a1d1
a1c1
a1b1
a1a2
e1b1
e1c1
e1d1
e1f1
e1e2
g1h1
g1f2
g1f1
d2c4
d2e4
d2b1
d2f1
g2g4
g2g3
h2h4
h2h3
a3a4
b3a2
b3a4
b3d1
b3c2
b3f7
b3e6
b3d5
b3c4
b3b1
b3b2
b3c3
b3b6
b3b5
b3b4
e3e4
f3f4
d4c3
d4b6
d4c5
d4g7
d4f6
d4e5

## Board State Fen
2rq2k1/p4ppp/1pr3b1/8/3B4/PQn1PP2/3N2PP/R3R1K1 w - - 3 21
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
a1d1
a1c1
a1b1
a1a2
e1b1
e1c1
e1d1
e1f1
e1e2
g1h1
g1f2
g1f1
d2c4
d2e4
d2b1
d2f1
g2g4
g2g3
h2h4
h2h3
a3a4
b3a2
b3a4
b3d1
b3c2
b3f7
b3e6
b3d5
b3c4
b3b1
b3b2
b3c3
b3b6
b3b5
b3b4
e3e4
f3f4
d4c3
d4b6
d4c5
d4g7
d4f6
d4e5

## Board State Fen
2rq2k1/p4ppp/1pr3b1/8/3B4/PQn1PP2/3N2PP/R3R1K1 w - - 3 21
assistant
d2f1