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
b5c4
b5b4
c5a3
c5b4
c5a7
c5b6
c5g1
c5f2
c5e3
c5d4
c5f8
c5e7
c5d6
c5c4
c5c7
c5c6
d5c3
d5c7
d5e3
d5e7
d5b4
d5b6
d5f4
d5f6
f5f4
a6a5
g6g5
d7d6
f7f6
h7h5
h7h6
a8a7
a8b8
c8b7
e8g8
e8f8
e8e7
e8d8
h8f8
h8g8

## Board State Fen
r1b1k2r/3p1p1p/p5p1/1pqnPp2/2P5/3B1Q2/P2B2PP/R4R1K b kq - 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
b5c4
b5b4
c5a3
c5b4
c5a7
c5b6
c5g1
c5f2
c5e3
c5d4
c5f8
c5e7
c5d6
c5c4
c5c7
c5c6
d5c3
d5c7
d5e3
d5e7
d5b4
d5b6
d5f4
d5f6
f5f4
a6a5
g6g5
d7d6
f7f6
h7h5
h7h6
a8a7
a8b8
c8b7
e8g8
e8f8
e8e7
e8d8
h8f8
h8g8

## Board State Fen
r1b1k2r/3p1p1p/p5p1/1pqnPp2/2P5/3B1Q2/P2B2PP/R4R1K b kq - 0 19
assistant
b5c4