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
c6a6
c6b6
c6c2
c6c3
c6c4
c6c5
c6c8
c6c7
e6d5
e6c8
e6d7
e6h3
e6g4
e6f5
f6d8
f6e7
f6h4
f6g5
f6f3
f6f4
f6f5
g6g5
a7a5
a7a6
b7b5
b7b6
g7h8
g7h7
g7g8
g7f8
e8a8
e8b8
e8c8
e8d8
e8e7
e8h8
e8g8
e8f8

## Board State Fen
4r3/pp3pk1/2rpbqp1/3Np2p/4P2P/5P2/PPPQ2P1/1K1R3R b - - 5 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
c6a6
c6b6
c6c2
c6c3
c6c4
c6c5
c6c8
c6c7
e6d5
e6c8
e6d7
e6h3
e6g4
e6f5
f6d8
f6e7
f6h4
f6g5
f6f3
f6f4
f6f5
g6g5
a7a5
a7a6
b7b5
b7b6
g7h8
g7h7
g7g8
g7f8
e8a8
e8b8
e8c8
e8d8
e8e7
e8h8
e8g8
e8f8

## Board State Fen
4r3/pp3pk1/2rpbqp1/3Np2p/4P2P/5P2/PPPQ2P1/1K1R3R b - - 5 21
assistant
e6d5