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
b6b5
f6e4
f6g4
f6g8
f6d5
f6h5
g6g5
h6h5
b7a5
b7c5
b7d8
c7c5
c7c6
d7a4
d7b5
d7c6
d7c8
d7h3
d7g4
d7f5
d7e6
e7d8
e7f8
e7e6
g7f8
g7h8
h7h8
h7g8
a8a1
a8a2
a8a3
a8a4
a8a5
a8a6
a8a7
a8d8
a8c8
a8b8
e8b8
e8c8
e8d8
e8h8
e8g8
e8f8

## Board State Fen
r3r3/1npbqpbk/1p1p1npp/3Pp3/2P1P3/1PQBBNNP/5PP1/3RR1K1 b - - 0 19
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
b6b5
f6e4
f6g4
f6g8
f6d5
f6h5
g6g5
h6h5
b7a5
b7c5
b7d8
c7c5
c7c6
d7a4
d7b5
d7c6
d7c8
d7h3
d7g4
d7f5
d7e6
e7d8
e7f8
e7e6
g7f8
g7h8
h7h8
h7g8
a8a1
a8a2
a8a3
a8a4
a8a5
a8a6
a8a7
a8d8
a8c8
a8b8
e8b8
e8c8
e8d8
e8h8
e8g8
e8f8

## Board State Fen
r3r3/1npbqpbk/1p1p1npp/3Pp3/2P1P3/1PQBBNNP/5PP1/3RR1K1 b - - 0 19
assistant
b7c5