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
b1a1
b1h1
b1g1
b1f1
b1e1
b1d1
b1c1
b1b8
b1b7
b1b6
b1b5
b1b4
b1b3
b1b2
g6g5
e7f8
e7f7
e7f6
e7e8
e7e6

## Board State Fen
8/4k3/6p1/3R1p1p/K1P2P1P/8/8/1r6 b - - 2 55
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
b1a1
b1h1
b1g1
b1f1
b1e1
b1d1
b1c1
b1b8
b1b7
b1b6
b1b5
b1b4
b1b3
b1b2
g6g5
e7f8
e7f7
e7f6
e7e8
e7e6

## Board State Fen
8/4k3/6p1/3R1p1p/K1P2P1P/8/8/1r6 b - - 2 55
assistant
b1h1