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
b6a4
b6c4
b6c8
b6d5
b6d7
f6e4
f6g4
f6d5
f6d7
f6h5
h7h5
h7h6
c7c5
c7c6
g7f8
g7h6
g7h8
d6d5
b7a6
b7e4
b7d5
b7c6
b7c8
b5b4
e5d4
a8a1
a8a2
a8a3
a8a4
a8a5
a8a6
a8a7
a8c8
a8b8
d8e7
d8b8
d8c8
d8d7
e8e6
e8e7
e8f8
g8h8
g8f8

## Board State Fen
r2qr1k1/1bp2pbp/1n1p1np1/1p2p1B1/3PP3/2PB1NNP/1P3PP1/R2QR1K1 b - - 3 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
b6a4
b6c4
b6c8
b6d5
b6d7
f6e4
f6g4
f6d5
f6d7
f6h5
h7h5
h7h6
c7c5
c7c6
g7f8
g7h6
g7h8
d6d5
b7a6
b7e4
b7d5
b7c6
b7c8
b5b4
e5d4
a8a1
a8a2
a8a3
a8a4
a8a5
a8a6
a8a7
a8c8
a8b8
d8e7
d8b8
d8c8
d8d7
e8e6
e8e7
e8f8
g8h8
g8f8

## Board State Fen
r2qr1k1/1bp2pbp/1n1p1np1/1p2p1B1/3PP3/2PB1NNP/1P3PP1/R2QR1K1 b - - 3 18
assistant
a8a1