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
c1a3
c1b2
d1h5
d1g4
d1f3
d1e2
e1f1
e1e7
e1e6
e1e5
e1e4
e1e3
e1e2
g1h1
g1f1
a2a4
a2a3
d2d4
d2d3
f2f4
f2f3
g2g4
g2g3
h2h4
h2h3
c4b3
c4a6
c4b5
c4f1
c4e2
c4d3
c4f7
c4e6
c4d5
g5f3
g5f7
g5h3
g5h7
g5e4
g5e6

## Board State Fen
r1bq1rk1/pp2ppbp/2n3p1/2p3N1/2B5/2P5/P1PP1PPP/R1BQR1K1 w - - 4 10
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
c1a3
c1b2
d1h5
d1g4
d1f3
d1e2
e1f1
e1e7
e1e6
e1e5
e1e4
e1e3
e1e2
g1h1
g1f1
a2a4
a2a3
d2d4
d2d3
f2f4
f2f3
g2g4
g2g3
h2h4
h2h3
c4b3
c4a6
c4b5
c4f1
c4e2
c4d3
c4f7
c4e6
c4d5
g5f3
g5f7
g5h3
g5h7
g5e4
g5e6

## Board State Fen
r1bq1rk1/pp2ppbp/2n3p1/2p3N1/2B5/2P5/P1PP1PPP/R1BQR1K1 w - - 4 10
assistant
a1b1