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
b4b5
f5e5
f5f4
f5f6
g5f6
g5g6
g3g4
g2h3
g2h2
g2h1
g2g1
g2f1
f3e1
f3e5
f3g1
f3d2
f3d4
f3h2
f3h4
a3a4

## Board State Fen
8/p2n3k/1p3p2/4pRP1/1Pr1P3/P3pNP1/6K1/8 w - - 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
b4b5
f5e5
f5f4
f5f6
g5f6
g5g6
g3g4
g2h3
g2h2
g2h1
g2g1
g2f1
f3e1
f3e5
f3g1
f3d2
f3d4
f3h2
f3h4
a3a4

## Board State Fen
8/p2n3k/1p3p2/4pRP1/1Pr1P3/P3pNP1/6K1/8 w - - 0 45
assistant
g5f6