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
b4a3
b4a5
b4c3
b4f8
b4e7
b4d6
b4c5
e5f6
e5f5
e5f4
e5e6
e5d6
e5d5

## Board State Fen
8/8/8/4K3/1B6/2pk4/8/8 w - - 0 69
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
b4a3
b4a5
b4c3
b4f8
b4e7
b4d6
b4c5
e5f6
e5f5
e5f4
e5e6
e5d6
e5d5

## Board State Fen
8/8/8/4K3/1B6/2pk4/8/8 w - - 0 69
assistant
b4c3