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
b7a6
b7a8
b7h1
b7g2
b7f3
b7e4
b7d5
b7c6
b7c8
a7a1
a7a2
a7a3
a7a4
a7a5
a7a6
a7a8
e2f3
e2f2
e2f1
e2d2
e2d1
d4d5
e3e4
h2h4
h2h3
b2b4
b2b3
e1a5
e1b4
e1c3
e1d2
e1h4
e1g3
e1f2

## Board State Fen
1r2n3/RBbk3p/4p3/1p3p2/2pP1P2/4P3/1P2K2P/4B3 w - - 0 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
b7a6
b7a8
b7h1
b7g2
b7f3
b7e4
b7d5
b7c6
b7c8
a7a1
a7a2
a7a3
a7a4
a7a5
a7a6
a7a8
e2f3
e2f2
e2f1
e2d2
e2d1
d4d5
e3e4
h2h4
h2h3
b2b4
b2b3
e1a5
e1b4
e1c3
e1d2
e1h4
e1g3
e1f2

## Board State Fen
1r2n3/RBbk3p/4p3/1p3p2/2pP1P2/4P3/1P2K2P/4B3 w - - 0 29
assistant
d4d5