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
a1c1
a1b1
a1a2
d1e2
d1b1
d1c1
e1f1
e1e2
g1h1
g1f1
c2c4
c2c3
d2c4
d2b1
d2b3
d2f1
g2g3
h2h4
h2h3
a3a4
d3d4
e3c5
e3d4
e3h6
e3g5
e3f4
f3e5
f3g5
f3d4
f3h4
b4a5
b4c5
b4b5

## Board State Fen
r1b1k2r/2q2pbp/1pp3p1/p1p1p3/1P2P1n1/P2PBN2/2PN1PPP/R2QR1K1 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
a1c1
a1b1
a1a2
d1e2
d1b1
d1c1
e1f1
e1e2
g1h1
g1f1
c2c4
c2c3
d2c4
d2b1
d2b3
d2f1
g2g3
h2h4
h2h3
a3a4
d3d4
e3c5
e3d4
e3h6
e3g5
e3f4
f3e5
f3g5
f3d4
f3h4
b4a5
b4c5
b4b5

## Board State Fen
r1b1k2r/2q2pbp/1pp3p1/p1p1p3/1P2P1n1/P2PBN2/2PN1PPP/R2QR1K1 w kq - 1 12
assistant
b4c5