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
b1a1
b1d1
b1c1
b1b6
b1b5
b1b4
b1b3
b1b2
e1c1
e1d1
e1f1
e1e2
g1h1
g1g2
g1f1
a2a4
a2a3
f2f4
f2f3
c3c4
e3c1
e3d2
e3h6
e3g5
e3f4
h3g5
h3f4

## Board State Fen
4rrk1/ppp2p2/1n1b4/3p3p/3P4/2P1B2N/P1P2P1P/1R2R1K1 w - - 0 19
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
b1a1
b1d1
b1c1
b1b6
b1b5
b1b4
b1b3
b1b2
e1c1
e1d1
e1f1
e1e2
g1h1
g1g2
g1f1
a2a4
a2a3
f2f4
f2f3
c3c4
e3c1
e3d2
e3h6
e3g5
e3f4
h3g5
h3f4

## Board State Fen
4rrk1/ppp2p2/1n1b4/3p3p/3P4/2P1B2N/P1P2P1P/1R2R1K1 w - - 0 19
assistant
e3f4