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
a6a5
d6a3
d6b4
d6c5
d6e5
d6f8
d6e7
f6e4
f6g4
f6d5
f6d7
f6h5
f6h7
h6h5
b7b5
b7b6
c7c5
c7c6
g7g5
g7g6
a8a7
a8c8
a8b8
d8e7
d8b8
d8c8
d8d7
e8e5
e8e6
e8e7
e8f8
g8h8
g8h7
g8f8

## Board State Fen
r2qr1k1/1pp2pp1/p2b1n1p/3PN3/3P4/2N4P/PP2RPP1/R2Q2K1 b - - 0 15
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
a6a5
d6a3
d6b4
d6c5
d6e5
d6f8
d6e7
f6e4
f6g4
f6d5
f6d7
f6h5
f6h7
h6h5
b7b5
b7b6
c7c5
c7c6
g7g5
g7g6
a8a7
a8c8
a8b8
d8e7
d8b8
d8c8
d8d7
e8e5
e8e6
e8e7
e8f8
g8h8
g8h7
g8f8

## Board State Fen
r2qr1k1/1pp2pp1/p2b1n1p/3PN3/3P4/2N4P/PP2RPP1/R2Q2K1 b - - 0 15
assistant
d6b4