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
d4a1
d4b2
d4c3
d4a7
d4b6
d4c5
d4g1
d4f2
d4e3
d4e5
h5h4
e6f7
e6e7
e6e5
e6d7
e6d6
f6f5
g6g5

## Board State Fen
8/8/4kpp1/N6p/3bP3/3P1K1P/8/8 b - - 5 42
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
d4a1
d4b2
d4c3
d4a7
d4b6
d4c5
d4g1
d4f2
d4e3
d4e5
h5h4
e6f7
e6e7
e6e5
e6d7
e6d6
f6f5
g6g5

## Board State Fen
8/8/4kpp1/N6p/3bP3/3P1K1P/8/8 b - - 5 42
assistant
d4b6