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
b2a1
b2e5
b2d4
b2c3
e2e4
e2e3
d1f1
d1e1
d2c4
d2e4
d2b1
d2f1
d2f3
c1a1
c1b1
c2b1
c2c5
c2c4
c2c3
g1h1
g1f1
g2f1
g2d5
g2e4
g2f3
g2h1
g2h3
h2h4
h2h3
a3a4
b3b4
d3d4
g3g4

## Board State Fen
r2rq2k/1pp3pp/2n1bp2/p1bnp3/8/PP1P2P1/1BQNPPBP/2RR2K1 w - - 0 18
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
b2a1
b2e5
b2d4
b2c3
e2e4
e2e3
d1f1
d1e1
d2c4
d2e4
d2b1
d2f1
d2f3
c1a1
c1b1
c2b1
c2c5
c2c4
c2c3
g1h1
g1f1
g2f1
g2d5
g2e4
g2f3
g2h1
g2h3
h2h4
h2h3
a3a4
b3b4
d3d4
g3g4

## Board State Fen
r2rq2k/1pp3pp/2n1bp2/p1bnp3/8/PP1P2P1/1BQNPPBP/2RR2K1 w - - 0 18
assistant
c2c5