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
d1c2
d1h5
d1g4
d1f3
d1e2
d1e1
f1e1
g1h1
a2a4
a2a3
d2e4
d2b1
d2f3
f2f4
f2f3
g2g4
g2g3
h2h4
h2h3
b3b4
c4a6
c4b5
c4e2
c4d3
c4e6
c4d5
d4d5

## Board State Fen
rnbq1rk1/1p3ppp/p3pn2/8/2BP4/1P6/P2N1PPP/R1BQ1RK1 w - - 1 11
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
d1c2
d1h5
d1g4
d1f3
d1e2
d1e1
f1e1
g1h1
a2a4
a2a3
d2e4
d2b1
d2f3
f2f4
f2f3
g2g4
g2g3
h2h4
h2h3
b3b4
c4a6
c4b5
c4e2
c4d3
c4e6
c4d5
d4d5

## Board State Fen
rnbq1rk1/1p3ppp/p3pn2/8/2BP4/1P6/P2N1PPP/R1BQ1RK1 w - - 1 11
assistant
c1a3