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
b7b6
c6b4
c6b8
c6d4
c6a7
c6e7
g7g5
g7g6
h6h5
e6e8
e6e7
f6e4
f6e8
f6g4
f6d5
f6d7
f6h5
f6h7
d6d5
a8a6
a8a7
a8c8
a8b8
d8e7
d8b8
d8c8
d8d7
d8f8
d8e8
g8h8
g8h7
g8f8

## Board State Fen
r2q2k1/1pp2pp1/2nprn1p/pP2p3/P3P3/2PPNN2/5PPP/R2QR1K1 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
b7b6
c6b4
c6b8
c6d4
c6a7
c6e7
g7g5
g7g6
h6h5
e6e8
e6e7
f6e4
f6e8
f6g4
f6d5
f6d7
f6h5
f6h7
d6d5
a8a6
a8a7
a8c8
a8b8
d8e7
d8b8
d8c8
d8d7
d8f8
d8e8
g8h8
g8h7
g8f8

## Board State Fen
r2q2k1/1pp2pp1/2nprn1p/pP2p3/P3P3/2PPNN2/5PPP/R2QR1K1 b - - 0 15
assistant
c6b8