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
d1f1
d1e1
d1d6
d1d5
d1d4
d1d3
d1d2
d7a7
d7b7
d7c7
d7d2
d7d3
d7d4
d7d5
d7d6
d7f7
d7e7
d7d8
g2g4
g2g3
a4b5
a4a5
g1h2
g1h1
g1f1
b3b4
f2f4
f2f3

## Board State Fen
8/3R1ppk/p1r4p/1p2r2P/P7/1P6/5PP1/3R2K1 w - b6 0 38
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
d1f1
d1e1
d1d6
d1d5
d1d4
d1d3
d1d2
d7a7
d7b7
d7c7
d7d2
d7d3
d7d4
d7d5
d7d6
d7f7
d7e7
d7d8
g2g4
g2g3
a4b5
a4a5
g1h2
g1h1
g1f1
b3b4
f2f4
f2f3

## Board State Fen
8/3R1ppk/p1r4p/1p2r2P/P7/1P6/5PP1/3R2K1 w - b6 0 38
assistant
a4b5