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
b5a4
b5d3
b5c4
b5e8
b5d7
b5c6
h5e5
h5f5
h5g5
h5h4
h5h8
h5h7
h5h6
a6a5
b7b6
b8c8
b8c7
b8a8
b8a7
g8c8
g8d8
g8e8
g8f8
g8g6
g8g7
g8h8

## Board State Fen
1k4r1/1p6/p5P1/1b2P2r/3p4/P2N1R1p/1P1R3K/8 b - - 2 37
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
b5a4
b5d3
b5c4
b5e8
b5d7
b5c6
h5e5
h5f5
h5g5
h5h4
h5h8
h5h7
h5h6
a6a5
b7b6
b8c8
b8c7
b8a8
b8a7
g8c8
g8d8
g8e8
g8f8
g8g6
g8g7
g8h8

## Board State Fen
1k4r1/1p6/p5P1/1b2P2r/3p4/P2N1R1p/1P1R3K/8 b - - 2 37
assistant
b5d3