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
f6d4
f6e5
f6e7
f6h4
f6g5
h7h5
h7h6
g7g5
g7g6
c6b4
c6b8
c6d4
c6a5
c6a7
c6e5
c6e7
a6a5
b5b4
d8a5
d8b6
d8c7
d8e7
d8a8
d8b8
d8c8
d8d6
d8d7
e8e1
e8e2
e8e3
e8e4
e8e5
e8e6
e8e7
e8f8
g8h8
g8f8

## Board State Fen
3qr1k1/5ppp/p1nR1b2/1p6/3P4/PBN2P2/1P3P1P/3Q1RK1 b - - 0 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
f6d4
f6e5
f6e7
f6h4
f6g5
h7h5
h7h6
g7g5
g7g6
c6b4
c6b8
c6d4
c6a5
c6a7
c6e5
c6e7
a6a5
b5b4
d8a5
d8b6
d8c7
d8e7
d8a8
d8b8
d8c8
d8d6
d8d7
e8e1
e8e2
e8e3
e8e4
e8e5
e8e6
e8e7
e8f8
g8h8
g8f8

## Board State Fen
3qr1k1/5ppp/p1nR1b2/1p6/3P4/PBN2P2/1P3P1P/3Q1RK1 b - - 0 21
assistant
d8d6