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
b3a2
b3a4
b3d1
b3c2
b3e6
b3d5
b3c4
a5a4
e5e4
c6b4
c6b8
c6d4
c6a7
c6e7
f6f5
b7b5
b7b6
f7c4
f7d5
f7e6
f7h5
f7g6
f7d7
f7e7
f7f8
g7g5
g7g6
h7h5
h7h6
d8a8
d8b8
d8c8
d8d3
d8d4
d8d5
d8d6
d8d7
e8e6
e8e7
e8f8
g8h8
g8f8

## Board State Fen
3rr1k1/1pp2qpp/2n2p2/p1R1p3/8/Pb1P1NP1/1Q2PPBP/2R3K1 b - - 1 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
b3a2
b3a4
b3d1
b3c2
b3e6
b3d5
b3c4
a5a4
e5e4
c6b4
c6b8
c6d4
c6a7
c6e7
f6f5
b7b5
b7b6
f7c4
f7d5
f7e6
f7h5
f7g6
f7d7
f7e7
f7f8
g7g5
g7g6
h7h5
h7h6
d8a8
d8b8
d8c8
d8d3
d8d4
d8d5
d8d6
d8d7
e8e6
e8e7
e8f8
g8h8
g8f8

## Board State Fen
3rr1k1/1pp2qpp/2n2p2/p1R1p3/8/Pb1P1NP1/1Q2PPBP/2R3K1 b - - 1 21
assistant
a5a4