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
a4d1
a4c2
a4b3
a4e8
a4d7
a4c6
a4b5
a4a3
a4d4
a4c4
a4b4
a4a6
a4a5
e6e5
h6h5
a7a5
a7a6
b7b5
b7b6
e7f5
e7c6
e7g6
f7f5
f7f6
g7g5
g7g6
a8b8
c8b8
c8c1
c8c2
c8c3
c8c4
c8c5
c8c6
c8c7
c8f8
c8e8
c8d8
g8h8
g8f8

## Board State Fen
r1r3k1/pp2npp1/4p2p/3p4/q2P4/P2QP2P/1P1N1PP1/2R2RK1 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
a4d1
a4c2
a4b3
a4e8
a4d7
a4c6
a4b5
a4a3
a4d4
a4c4
a4b4
a4a6
a4a5
e6e5
h6h5
a7a5
a7a6
b7b5
b7b6
e7f5
e7c6
e7g6
f7f5
f7f6
g7g5
g7g6
a8b8
c8b8
c8c1
c8c2
c8c3
c8c4
c8c5
c8c6
c8c7
c8f8
c8e8
c8d8
g8h8
g8f8

## Board State Fen
r1r3k1/pp2npp1/4p2p/3p4/q2P4/P2QP2P/1P1N1PP1/2R2RK1 b - - 6 21
assistant
c8c1