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
b5b4
e7a7
e7b7
e7c7
e7d7
e7e6
e7e8
d3c1
d3c5
d3e1
d3b2
d3b4
d3f2
d3f4
d4c2
d4c6
d4e2
d4e6
d4b3
d4f3
d4f5
f7f5
f7f6
g7f6
g7f8
g7h6
g7h8
b8a8
b8b6
b8b7
b8f8
b8e8
b8d8
b8c8
g8h8
g8h7
g8f8

## Board State Fen
1r4k1/4rpb1/3p2p1/1p1Pp1P1/p2nP1B1/P2nB3/1P1N1PK1/1R1R4 b - - 5 30
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
b5b4
e7a7
e7b7
e7c7
e7d7
e7e6
e7e8
d3c1
d3c5
d3e1
d3b2
d3b4
d3f2
d3f4
d4c2
d4c6
d4e2
d4e6
d4b3
d4f3
d4f5
f7f5
f7f6
g7f6
g7f8
g7h6
g7h8
b8a8
b8b6
b8b7
b8f8
b8e8
b8d8
b8c8
g8h8
g8h7
g8f8

## Board State Fen
1r4k1/4rpb1/3p2p1/1p1Pp1P1/p2nP1B1/P2nB3/1P1N1PK1/1R1R4 b - - 5 30
assistant
d3c5