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
f3e1
f3e5
f3g1
f3d2
f3d4
f3h2
f3h4
e4e3
e4d4
e4d3
b7a7
b7b5
b7b6
b7f7
b7e7
b7d7
b7c7
b7b8

## Board State Fen
6k1/1R3p2/6p1/1p3rP1/4K3/5N2/8/8 w - - 4 105
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
f3e1
f3e5
f3g1
f3d2
f3d4
f3h2
f3h4
e4e3
e4d4
e4d3
b7a7
b7b5
b7b6
b7f7
b7e7
b7d7
b7c7
b7b8

## Board State Fen
6k1/1R3p2/6p1/1p3rP1/4K3/5N2/8/8 w - - 4 105
assistant
b7b6