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
c7c5
c7c6
a6a5
f7f5
f7f6
g6g5
d5d4
g7e5
g7f6
g7f8
g7h6
g7h8
h7h5
h7h6
a8a7
a8b8
c8b7
c8h3
c8g4
c8f5
c8e6
c8d7
c8b8
c8f8
c8e8
c8d8
g8h8
g8f8

## Board State Fen
r1q3k1/2p2pbp/pp4p1/3pP3/P4P2/4B3/1PP1Q1PP/4R1K1 b - f3 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
c7c5
c7c6
a6a5
f7f5
f7f6
g6g5
d5d4
g7e5
g7f6
g7f8
g7h6
g7h8
h7h5
h7h6
a8a7
a8b8
c8b7
c8h3
c8g4
c8f5
c8e6
c8d7
c8b8
c8f8
c8e8
c8d8
g8h8
g8f8

## Board State Fen
r1q3k1/2p2pbp/pp4p1/3pP3/P4P2/4B3/1PP1Q1PP/4R1K1 b - f3 0 19
assistant
c8d7