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
f4g3
c5c4
h5g3
h5g7
h5f6
g6g5
a7a5
a7a6
c7a5
c7b6
c7d6
c7d8
c7b7
d7b6
d7f6
e7d6
e7d8
e7h4
e7g5
e7f6
h7h6
b8a8
b8b2
b8b3
b8b4
b8b5
b8b6
b8b7
c8a6
c8b7
f8d8
f8e8
f8f5
f8f6
f8f7
g8h8
g8g7
g8f7

## Board State Fen
1rb2rk1/p1qnb2p/2p3p1/2p1p2n/N3Pp2/2Q2PPB/PP3B1P/1K1R2NR b - - 5 18
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
f4g3
c5c4
h5g3
h5g7
h5f6
g6g5
a7a5
a7a6
c7a5
c7b6
c7d6
c7d8
c7b7
d7b6
d7f6
e7d6
e7d8
e7h4
e7g5
e7f6
h7h6
b8a8
b8b2
b8b3
b8b4
b8b5
b8b6
b8b7
c8a6
c8b7
f8d8
f8e8
f8f5
f8f6
f8f7
g8h8
g8g7
g8f7

## Board State Fen
1rb2rk1/p1qnb2p/2p3p1/2p1p2n/N3Pp2/2Q2PPB/PP3B1P/1K1R2NR b - - 5 18
assistant
c5c4