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
d6a3
d6b4
d6c5
d6b8
d6c7
d6e6
d5c4
d5e4
d5d4
c6c5
a6a5
f6g5
f6h8
f6g7
h6g5
h6h5
b7b5
b7b6
d7c8
d7h3
d7g4
d7f5
d7e6
d7e8
e7f5
e7c8
d8a8
d8b8
d8c8
d8e8
f8e8
g8h8
g8g7

## Board State Fen
3r1rk1/1p1bnp2/p1pq1bpp/3pp1N1/2N1P2P/1BPP1Q2/PP3PP1/3RK2R b K - 1 18
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
d6a3
d6b4
d6c5
d6b8
d6c7
d6e6
d5c4
d5e4
d5d4
c6c5
a6a5
f6g5
f6h8
f6g7
h6g5
h6h5
b7b5
b7b6
d7c8
d7h3
d7g4
d7f5
d7e6
d7e8
e7f5
e7c8
d8a8
d8b8
d8c8
d8e8
f8e8
g8h8
g8g7

## Board State Fen
3r1rk1/1p1bnp2/p1pq1bpp/3pp1N1/2N1P2P/1BPP1Q2/PP3PP1/3RK2R b K - 1 18
assistant
d5c4