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
f5f4
c6b4
c6b8
c6d4
c6a5
c6e5
h6h5
a7a5
a7a6
b7b5
b7b6
e7f7
e7e8
e7e6
e7d7
d8a8
d8b8
d8c8
d8d3
d8d4
d8d5
d8d6
d8d7
d8e8
f8e8
f8f6
f8f7
f8h8
f8g8

## Board State Fen
3r1r2/pp2k3/2n4p/4Pp2/8/3BR3/PP4PP/2KR4 b - - 2 21
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
f5f4
c6b4
c6b8
c6d4
c6a5
c6e5
h6h5
a7a5
a7a6
b7b5
b7b6
e7f7
e7e8
e7e6
e7d7
d8a8
d8b8
d8c8
d8d3
d8d4
d8d5
d8d6
d8d7
d8e8
f8e8
f8f6
f8f7
f8h8
f8g8

## Board State Fen
3r1r2/pp2k3/2n4p/4Pp2/8/3BR3/PP4PP/2KR4 b - - 2 21
assistant
d8d5