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
a1e1
a1d1
a1c1
a1b1
a1a3
a1a2
f1b1
f1c1
f1d1
f1e1
f1f5
f1f4
f1f3
f1f2
g1h2
g1h1
g1f2
c2c3
d2c4
d2e4
d2b1
d2f3
g2g4
g2g3
b3c4
b3b4
d3c4
d3d4
e3e4
h3h4
a4a5

## Board State Fen
r4rk1/1pp3p1/p1n4p/4pp2/P1q5/1P1PP2P/2PN2P1/R4RK1 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
a1e1
a1d1
a1c1
a1b1
a1a3
a1a2
f1b1
f1c1
f1d1
f1e1
f1f5
f1f4
f1f3
f1f2
g1h2
g1h1
g1f2
c2c3
d2c4
d2e4
d2b1
d2f3
g2g4
g2g3
b3c4
b3b4
d3c4
d3d4
e3e4
h3h4
a4a5

## Board State Fen
r4rk1/1pp3p1/p1n4p/4pp2/P1q5/1P1PP2P/2PN2P1/R4RK1 w - - 0 18
assistant
b3c4