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
b4a2
b4c2
b4c6
b4d3
b4d5
f5e4
f5f4
g6g5
d7a4
d7b5
d7c6
d7c8
d7e6
d7e8
a6a5
h6h5
c5c4
e7d8
e7h4
e7g5
e7f6
e7e6
e7f7
e7e8
g7f6
g7h8
h7h8
b8a8
b8b5
b8b6
b8b7
b8e8
b8d8
b8c8
f8c8
f8d8
f8e8
f8f6
f8f7
f8h8
f8g8

## Board State Fen
1r3r2/3bq1bk/p2p2pp/2pBpp2/Pn2P3/1P1P1N1P/1BP2PP1/R2QR1K1 b - - 2 20
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
b4a2
b4c2
b4c6
b4d3
b4d5
f5e4
f5f4
g6g5
d7a4
d7b5
d7c6
d7c8
d7e6
d7e8
a6a5
h6h5
c5c4
e7d8
e7h4
e7g5
e7f6
e7e6
e7f7
e7e8
g7f6
g7h8
h7h8
b8a8
b8b5
b8b6
b8b7
b8e8
b8d8
b8c8
f8c8
f8d8
f8e8
f8f6
f8f7
f8h8
f8g8

## Board State Fen
1r3r2/3bq1bk/p2p2pp/2pBpp2/Pn2P3/1P1P1N1P/1BP2PP1/R2QR1K1 b - - 2 20
assistant
f5e4