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
d1a1
d1b1
d1c1
d1h1
d1g1
d1f1
d1e1
d1d3
d1d2
g2h3
g2h2
g2h1
g2g1
g2f3
g2f2
g2f1
g3g4
b5a4
b5a6
b5f1
b5e2
b5d3
b5c4

## Board State Fen
8/2r2pk1/2P2bp1/1B1p3p/3P3P/6P1/6K1/3R4 w - - 0 50
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
d1a1
d1b1
d1c1
d1h1
d1g1
d1f1
d1e1
d1d3
d1d2
g2h3
g2h2
g2h1
g2g1
g2f3
g2f2
g2f1
g3g4
b5a4
b5a6
b5f1
b5e2
b5d3
b5c4

## Board State Fen
8/2r2pk1/2P2bp1/1B1p3p/3P3P/6P1/6K1/3R4 w - - 0 50
assistant
d1c1