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
a1b1
a1a2
c1h6
c1g5
c1f4
c1e3
c1d2
g1h1
g1f1
b2b4
b2b3
g2f1
g2h1
g2h3
h2h4
h2h3
a3a4
f3e1
f3g5
f3d2
f3d4
f3h4
g3g4
e4b1
e4c2
e4d3
e4h7
e4g6
e4f5
e4a4
e4b4
e4c4
e4d4
e4e1
e4e2
e4e3
e4h4
e4g4
e4f4
d5c5
d5d1
d5d2
d5d3
d5d4
d5d7
d5d6

## Board State Fen
r4rk1/pq1pbppp/1p2n3/n1pRP3/4Q3/P4NP1/1P3PBP/R1B3K1 w - - 1 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
a1b1
a1a2
c1h6
c1g5
c1f4
c1e3
c1d2
g1h1
g1f1
b2b4
b2b3
g2f1
g2h1
g2h3
h2h4
h2h3
a3a4
f3e1
f3g5
f3d2
f3d4
f3h4
g3g4
e4b1
e4c2
e4d3
e4h7
e4g6
e4f5
e4a4
e4b4
e4c4
e4d4
e4e1
e4e2
e4e3
e4h4
e4g4
e4f4
d5c5
d5d1
d5d2
d5d3
d5d4
d5d7
d5d6

## Board State Fen
r4rk1/pq1pbppp/1p2n3/n1pRP3/4Q3/P4NP1/1P3PBP/R1B3K1 w - - 1 18
assistant
f3h4