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
f4c1
f4d2
f4e3
f4b8
f4c7
f4d6
f4e5
f4h6
f4g5
e2e4
e2e3
g3g4
f3e1
f3e5
f3g5
f3d2
f3h4
a2a4
a2a3
d4a4
d4b4
d4c4
d4d1
d4d2
d4d3
d4e4
d4d5
h2h4
h2h3
a1f1
a1e1
a1d1
a1c1
a1b1
g2f1
g2h1
g2h3
g1h1
g1f1

## Board State Fen
2r3k1/1p1n1ppp/r3pn2/3b4/3R1B2/5NP1/P3PPBP/R5K1 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
f4c1
f4d2
f4e3
f4b8
f4c7
f4d6
f4e5
f4h6
f4g5
e2e4
e2e3
g3g4
f3e1
f3e5
f3g5
f3d2
f3h4
a2a4
a2a3
d4a4
d4b4
d4c4
d4d1
d4d2
d4d3
d4e4
d4d5
h2h4
h2h3
a1f1
a1e1
a1d1
a1c1
a1b1
g2f1
g2h1
g2h3
g1h1
g1f1

## Board State Fen
2r3k1/1p1n1ppp/r3pn2/3b4/3R1B2/5NP1/P3PPBP/R5K1 w - - 0 19
assistant
d4b4