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
d5a5
d5b5
d5c5
d5d1
d5d2
d5d3
d5d4
d5h5
d5g5
d5f5
d5e5
d5d8
d5d7
d5d6
c4a2
c4b3
c4a6
c4b5
c4f1
c4e2
c4d3
b4c3
b4b3
a3a2

## Board State Fen
R7/8/2K2P2/3r4/1kb5/p7/8/1B6 b - - 5 63
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
d5a5
d5b5
d5c5
d5d1
d5d2
d5d3
d5d4
d5h5
d5g5
d5f5
d5e5
d5d8
d5d7
d5d6
c4a2
c4b3
c4a6
c4b5
c4f1
c4e2
c4d3
b4c3
b4b3
a3a2

## Board State Fen
R7/8/2K2P2/3r4/1kb5/p7/8/1B6 b - - 5 63
assistant
d5d1