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
b1a1
b1b2
c1a3
c1b2
c1h6
c1g5
c1f4
c1e3
c1d2
g1h1
g1g2
g1f1
f2f4
f2f3
h2h4
h2h3
b3b4
g3g4
c4c5
b5a3
b5a7
b5c3
b5c7
b5d4
b5d6
d7a7
d7b7
d7c7
d7d1
d7d2
d7d3
d7d4
d7d5
d7d6
d7f7
d7e7
d7d8

## Board State Fen
r2r2k1/3R1pp1/1p2pb2/1N5p/2P1n3/1P4P1/5P1P/1RB3K1 w - - 2 29
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
b1a1
b1b2
c1a3
c1b2
c1h6
c1g5
c1f4
c1e3
c1d2
g1h1
g1g2
g1f1
f2f4
f2f3
h2h4
h2h3
b3b4
g3g4
c4c5
b5a3
b5a7
b5c3
b5c7
b5d4
b5d6
d7a7
d7b7
d7c7
d7d1
d7d2
d7d3
d7d4
d7d5
d7d6
d7f7
d7e7
d7d8

## Board State Fen
r2r2k1/3R1pp1/1p2pb2/1N5p/2P1n3/1P4P1/5P1P/1RB3K1 w - - 2 29
assistant
d7d8