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
b2b4
b2b3
d1a1
d1b1
d1c1
d1f1
d1e1
d1d3
d1d2
g1h2
g1h1
g1f1
a2a4
a2a3
c2b1
c2a4
c2b3
c2h7
c2g6
c2f5
c2e4
c2d3
c2c1
c2e2
c2d2
c2c3
f2f3
g2g3
h3h4
c4c5
d4d5
g4e2
g4f3
g4c8
g4d7
g4e6
g4f5
g4h5

## Board State Fen
4r1k1/ppq2pp1/2p2p1p/8/2PP1nB1/7P/PPQ2PP1/3R2K1 w - - 0 20
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
b2b4
b2b3
d1a1
d1b1
d1c1
d1f1
d1e1
d1d3
d1d2
g1h2
g1h1
g1f1
a2a4
a2a3
c2b1
c2a4
c2b3
c2h7
c2g6
c2f5
c2e4
c2d3
c2c1
c2e2
c2d2
c2c3
f2f3
g2g3
h3h4
c4c5
d4d5
g4e2
g4f3
g4c8
g4d7
g4e6
g4f5
g4h5

## Board State Fen
4r1k1/ppq2pp1/2p2p1p/8/2PP1nB1/7P/PPQ2PP1/3R2K1 w - - 0 20
assistant
c2d2