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
b4b3
a5a2
a5a3
a5a4
a5h5
a5g5
a5f5
a5e5
a5d5
a5c5
a5b5
a5a6
b6a4
b6a8
b6c4
b6c8
b6d5
b6d7
g6g5
a7a6
e7e5
e7e6
f7f5
f7f6
g7h8
g7g8
g7f6
h7h5
h7h6
f8a8
f8b8
f8c8
f8d8
f8e8
f8h8
f8g8

## Board State Fen
5r2/p3ppkp/1nP3p1/q7/1p2P3/5P2/P2QBP1P/3R2K1 b - - 0 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
b4b3
a5a2
a5a3
a5a4
a5h5
a5g5
a5f5
a5e5
a5d5
a5c5
a5b5
a5a6
b6a4
b6a8
b6c4
b6c8
b6d5
b6d7
g6g5
a7a6
e7e5
e7e6
f7f5
f7f6
g7h8
g7g8
g7f6
h7h5
h7h6
f8a8
f8b8
f8c8
f8d8
f8e8
f8h8
f8g8

## Board State Fen
5r2/p3ppkp/1nP3p1/q7/1p2P3/5P2/P2QBP1P/3R2K1 b - - 0 20
assistant
f8c8