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
c1b1
c1d1
c1c2
e1d2
e1d1
e1e4
e1e3
e1e2
f1a6
f1b5
f1c4
f1d3
f1e2
f1h3
f1g2
g1h1
g1g2
a2a4
a2a3
b2b4
b2b3
f2e3
h2h4
h2h3
c3b1
c3b5
c3d1
c3d5
c3a4
c3e2
c3e4
g3g4
f4f5

## Board State Fen
2r3k1/1prqnpbp/pn2p1p1/3pP3/3P1P2/2N3P1/PP3B1P/R1R1QBK1 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
a1b1
c1b1
c1d1
c1c2
e1d2
e1d1
e1e4
e1e3
e1e2
f1a6
f1b5
f1c4
f1d3
f1e2
f1h3
f1g2
g1h1
g1g2
a2a4
a2a3
b2b4
b2b3
f2e3
h2h4
h2h3
c3b1
c3b5
c3d1
c3d5
c3a4
c3e2
c3e4
g3g4
f4f5

## Board State Fen
2r3k1/1prqnpbp/pn2p1p1/3pP3/3P1P2/2N3P1/PP3B1P/R1R1QBK1 w - - 0 20
assistant
a1b1