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
f1a1
f1b1
f1c1
f1d1
f1e1
f1h1
f1g1
f1f2
b2a1
b2a3
b2c1
b2g7
b2f6
b2e5
b2d4
b2c3
e2f2
g2g4
g2g3
h2h4
h2h3
e3e4
f3f4
a5a6

## Board State Fen
3r2k1/5ppp/4p3/Pp6/1b6/4PP2/1B2K1PP/5R2 w - - 1 27
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
f1a1
f1b1
f1c1
f1d1
f1e1
f1h1
f1g1
f1f2
b2a1
b2a3
b2c1
b2g7
b2f6
b2e5
b2d4
b2c3
e2f2
g2g4
g2g3
h2h4
h2h3
e3e4
f3f4
a5a6

## Board State Fen
3r2k1/5ppp/4p3/Pp6/1b6/4PP2/1B2K1PP/5R2 w - - 1 27
assistant
b2d4