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
b7c8
h5g3
h5f4
h5f6
c7a5
c7b6
c7b8
c7d7
c7c8
e6e5
d6d5
c6b4
c6b8
c6d4
c6a5
c6a7
c6e5
a6a5
e7h4
e7g5
e7f6
e7f8
f7f5
f7f6
g7g5
g7g6
a8a7
a8c8
a8b8
d8b8
d8c8
d8d7
d8f8
d8e8
g8h8
g8h7
g8f8

## Board State Fen
r2r2k1/1bq1bpp1/p1npp2p/2p4n/2P1P3/2N1B1PP/PPQR1PBN/3R2K1 b - - 1 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
b7c8
h5g3
h5f4
h5f6
c7a5
c7b6
c7b8
c7d7
c7c8
e6e5
d6d5
c6b4
c6b8
c6d4
c6a5
c6a7
c6e5
a6a5
e7h4
e7g5
e7f6
e7f8
f7f5
f7f6
g7g5
g7g6
a8a7
a8c8
a8b8
d8b8
d8c8
d8d7
d8f8
d8e8
g8h8
g8h7
g8f8

## Board State Fen
r2r2k1/1bq1bpp1/p1npp2p/2p4n/2P1P3/2N1B1PP/PPQR1PBN/3R2K1 b - - 1 18
assistant
a8b8