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
d4c5
d4g1
d4f2
d4e3
d4f6
d4e5
g4d1
g4e2
g4f3
g4c8
g4d7
g4e6
g4f5
g4h3
h5h4
b6b5
b7a5
b7c5
b7d8
c7c5
c7c6
a8a1
a8a2
a8a3
a8a4
a8a5
a8a6
a8a7
a8d8
a8c8
a8b8
e8b8
e8c8
e8d8
e8e1
e8e2
e8e3
e8e4
e8e5
e8e6
e8e7
f8e7
f8h6
f8g7
g8h8

## Board State Fen
r3rqk1/1np2p2/1p1p1P2/3P2Pp/1PPb1Bb1/8/6PK/1BQRR3 b - - 2 31
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
d4c5
d4g1
d4f2
d4e3
d4f6
d4e5
g4d1
g4e2
g4f3
g4c8
g4d7
g4e6
g4f5
g4h3
h5h4
b6b5
b7a5
b7c5
b7d8
c7c5
c7c6
a8a1
a8a2
a8a3
a8a4
a8a5
a8a6
a8a7
a8d8
a8c8
a8b8
e8b8
e8c8
e8d8
e8e1
e8e2
e8e3
e8e4
e8e5
e8e6
e8e7
f8e7
f8h6
f8g7
g8h8

## Board State Fen
r3rqk1/1np2p2/1p1p1P2/3P2Pp/1PPb1Bb1/8/6PK/1BQRR3 b - - 2 31
assistant
g4d1