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
b4b5
g4g5
g7a7
g7b7
g7c7
g7d7
g7e7
g7f7
g7g5
g7g6
g7h7
g7g8
d3d2
d3c4
d3c3
d3c2

## Board State Fen
8/6R1/2n1r2p/7P/1P3kP1/3K4/8/8 w - - 1 57
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
b4b5
g4g5
g7a7
g7b7
g7c7
g7d7
g7e7
g7f7
g7g5
g7g6
g7h7
g7g8
d3d2
d3c4
d3c3
d3c2

## Board State Fen
8/6R1/2n1r2p/7P/1P3kP1/3K4/8/8 w - - 1 57
assistant
b4b5