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
e6b3
e6c4
e6d5
e6c8
e6d7
e6f5
b6a7
b6d4
b6c5
b6a6
b6b3
b6b4
b6b5
c7b5
c7d5
c7a6
c7a8
c7e8
d8a8
d8b8
d8c8
d8d4
d8d5
d8d6
d8d7
d8e8
f8e8
g8h8
h7h5
h7h6
g6f4
g6h4
g6h8
g6e5
g6e7
a5a4
f7f6
c6c5

## Board State Fen
3r1rk1/1pn2ppp/1qp1b1n1/p4N2/3P4/1B3Q1P/PP3PP1/R1BR2K1 b - - 6 21
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
e6b3
e6c4
e6d5
e6c8
e6d7
e6f5
b6a7
b6d4
b6c5
b6a6
b6b3
b6b4
b6b5
c7b5
c7d5
c7a6
c7a8
c7e8
d8a8
d8b8
d8c8
d8d4
d8d5
d8d6
d8d7
d8e8
f8e8
g8h8
h7h5
h7h6
g6f4
g6h4
g6h8
g6e5
g6e7
a5a4
f7f6
c6c5

## Board State Fen
3r1rk1/1pn2ppp/1qp1b1n1/p4N2/3P4/1B3Q1P/PP3PP1/R1BR2K1 b - - 6 21
assistant
f8e8