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
c6b4
c6b8
c6d4
c6a7
c6e7
e6c4
e6d5
e6c8
e6d7
e6h3
e6g4
e6f5
h5g3
h5g7
h5f4
g5g4
f6e7
f6h8
f6g7
f6f2
f6f3
f6f4
f6f5
f6g6
b7b5
b7b6
d8a8
d8b8
d8c8
d8d2
d8d3
d8d4
d8d5
d8d6
d8d7
d8e8
f8a3
f8b4
f8c5
f8d6
f8e7
f8g7
g8h8
g8h7
g8g7

## Board State Fen
3r1bk1/1pp2p2/2n1bq1p/p3p1pn/P1N1P3/2P1B2P/1PQN1PPK/4RB2 b - - 1 20
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
c6b4
c6b8
c6d4
c6a7
c6e7
e6c4
e6d5
e6c8
e6d7
e6h3
e6g4
e6f5
h5g3
h5g7
h5f4
g5g4
f6e7
f6h8
f6g7
f6f2
f6f3
f6f4
f6f5
f6g6
b7b5
b7b6
d8a8
d8b8
d8c8
d8d2
d8d3
d8d4
d8d5
d8d6
d8d7
d8e8
f8a3
f8b4
f8c5
f8d6
f8e7
f8g7
g8h8
g8h7
g8g7

## Board State Fen
3r1bk1/1pp2p2/2n1bq1p/p3p1pn/P1N1P3/2P1B2P/1PQN1PPK/4RB2 b - - 1 20
assistant
b7b6