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
b4a4
b4b2
b4b3
b4b6
b4b5
c4c3
h6h5
b7b5
b7b6
g7h8
g7h7
g7g8
g7g6
g7f8
g7f7

## Board State Fen
8/1p4k1/7p/4K3/1rp2PP1/8/1P1R4/8 b - - 0 48
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
b4a4
b4b2
b4b3
b4b6
b4b5
c4c3
h6h5
b7b5
b7b6
g7h8
g7h7
g7g8
g7g6
g7f8
g7f7

## Board State Fen
8/1p4k1/7p/4K3/1rp2PP1/8/1P1R4/8 b - - 0 48
assistant
b4b3