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
b1a3
b1c3
b1d2
c1h6
c1g5
c1f4
c1e3
c1d2
f1d1
f1e1
g1h1
a2a4
a2a3
b2b4
b2b3
c2a4
c2b3
c2d1
c2h7
c2g6
c2f5
c2e4
c2d3
c2d2
c2c4
c2c3
e2e4
e2e3
g2h1
g2h3
h2h4
h2h3
f3e1
f3e5
f3g5
f3d2
f3h4
g3g4
d4d5

## Board State Fen
rnbq1rk1/1pp1bppp/p3pn2/8/2pP4/5NP1/PPQ1PPBP/RNB2RK1 w - - 0 8
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
b1a3
b1c3
b1d2
c1h6
c1g5
c1f4
c1e3
c1d2
f1d1
f1e1
g1h1
a2a4
a2a3
b2b4
b2b3
c2a4
c2b3
c2d1
c2h7
c2g6
c2f5
c2e4
c2d3
c2d2
c2c4
c2c3
e2e4
e2e3
g2h1
g2h3
h2h4
h2h3
f3e1
f3e5
f3g5
f3d2
f3h4
g3g4
d4d5

## Board State Fen
rnbq1rk1/1pp1bppp/p3pn2/8/2pP4/5NP1/PPQ1PPBP/RNB2RK1 w - - 0 8
assistant
a2a4