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
a4a3
b5a5
b5b1
b5b2
b5b3
b5b4
b5f5
b5e5
b5d5
b5c5
b5b8
b5b7
b5b6
g5f4
g5d8
g5e7
g5f6
g5h4
g5h6
g7h7
g7g8
g7f8
g7f6

## Board State Fen
8/3R1Nk1/8/1r4bP/p4P2/8/6K1/8 b - - 0 42
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
a4a3
b5a5
b5b1
b5b2
b5b3
b5b4
b5f5
b5e5
b5d5
b5c5
b5b8
b5b7
b5b6
g5f4
g5d8
g5e7
g5f6
g5h4
g5h6
g7h7
g7g8
g7f8
g7f6

## Board State Fen
8/3R1Nk1/8/1r4bP/p4P2/8/6K1/8 b - - 0 42
assistant
b5b2