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
a1a3
a1a2
d1b3
d1c2
d1b1
d1c1
d1e1
d1d3
d1d2
f1e1
g1h1
b2b4
b2b3
e2a6
e2b5
e2c4
e2d3
e2h5
e2g4
e2f3
f2f4
f2f3
g2g4
g2g3
h2h3
e3e4
a4a5
d4c2
d4c6
d4e6
d4b3
d4b5
d4f3
d4f5
h4g3
h4e7
h4f6
h4g5

## Board State Fen
r1bq1rk1/1p2bpp1/p3p2p/3n4/P2N3B/4P3/1P2BPPP/R2Q1RK1 w - - 0 15
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
a1a3
a1a2
d1b3
d1c2
d1b1
d1c1
d1e1
d1d3
d1d2
f1e1
g1h1
b2b4
b2b3
e2a6
e2b5
e2c4
e2d3
e2h5
e2g4
e2f3
f2f4
f2f3
g2g4
g2g3
h2h3
e3e4
a4a5
d4c2
d4c6
d4e6
d4b3
d4b5
d4f3
d4f5
h4g3
h4e7
h4f6
h4g5

## Board State Fen
r1bq1rk1/1p2bpp1/p3p2p/3n4/P2N3B/4P3/1P2BPPP/R2Q1RK1 w - - 0 15
assistant
h4g3