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
d4a4
d4b4
d4c4
d4d1
d4d2
d4d3
d4h4
d4g4
d4f4
d4e4
d4d8
d4d7
d4d6
d4d5
a6a5
e6a2
e6b3
e6c4
e6d5
e6c8
e6d7
e6h3
e6g4
e6f5
b7b5
b7b6
f7f5
f7f6
g7g5
g7g6
h7h5
h7h6
f8a8
f8b8
f8c8
f8d8
f8e8
g8h8

## Board State Fen
5rk1/1pR2ppp/p3b3/8/3r4/P6P/1P3PP1/R4BK1 b - - 2 25
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
d4a4
d4b4
d4c4
d4d1
d4d2
d4d3
d4h4
d4g4
d4f4
d4e4
d4d8
d4d7
d4d6
d4d5
a6a5
e6a2
e6b3
e6c4
e6d5
e6c8
e6d7
e6h3
e6g4
e6f5
b7b5
b7b6
f7f5
f7f6
g7g5
g7g6
h7h5
h7h6
f8a8
f8b8
f8c8
f8d8
f8e8
g8h8

## Board State Fen
5rk1/1pR2ppp/p3b3/8/3r4/P6P/1P3PP1/R4BK1 b - - 2 25
assistant
f8b8