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
d6a3
d6b4
d6c5
d6b8
d6c7
d6h2
d6g3
d6f4
d6e5
d6f8
d6e7
b7a7
b7b3
b7b4
b7b5
b7b6
b7h7
b7g7
b7f7
b7e7
b7d7
b7c7
b7b8
b2b4
b2b3
e4d5
e4d4
e4d3
g2g4
g2g3
a2a4
a2a3

## Board State Fen
8/1R6/3B1p1k/p4Pb1/4K2p/8/PP4P1/5r2 w - a6 0 45
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
d6a3
d6b4
d6c5
d6b8
d6c7
d6h2
d6g3
d6f4
d6e5
d6f8
d6e7
b7a7
b7b3
b7b4
b7b5
b7b6
b7h7
b7g7
b7f7
b7e7
b7d7
b7c7
b7b8
b2b4
b2b3
e4d5
e4d4
e4d3
g2g4
g2g3
a2a4
a2a3

## Board State Fen
8/1R6/3B1p1k/p4Pb1/4K2p/8/PP4P1/5r2 w - a6 0 45
assistant
a2a4