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
b2b4
b2b3
f2f4
f2f3
g2h2
g2h1
g2g3
g2g1
g2f3
g2f1
a3a4
h3h4
d4a4
d4b4
d4c4
d4d1
d4d2
d4d3
d4f4
d4e4
d4d8
d4d7
d4d6
d4d5
g4g5

## Board State Fen
8/p1r4p/1p2k1p1/8/3R2P1/P6P/1P3PK1/8 w - - 3 36
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
b2b4
b2b3
f2f4
f2f3
g2h2
g2h1
g2g3
g2g1
g2f3
g2f1
a3a4
h3h4
d4a4
d4b4
d4c4
d4d1
d4d2
d4d3
d4f4
d4e4
d4d8
d4d7
d4d6
d4d5
g4g5

## Board State Fen
8/p1r4p/1p2k1p1/8/3R2P1/P6P/1P3PK1/8 w - - 3 36
assistant
d4d2