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
b7a8
b7e4
b7d5
b7c6
e6e5
a6a5
h7h5
h7h6
f7f5
f7f6
g6g5
d6d5
b5b4
c8a8
c8b8
c8c1
c8c2
c8c3
c8c4
c8c5
c8c6
c8c7
c8e8
c8d8
f8d8
f8e8
g8h8
g8g7

## Board State Fen
2r2rk1/1b3p1p/p2pp1p1/1p6/4PP2/P2P1P2/1P2N1KP/1RR5 b - - 4 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
b7a8
b7e4
b7d5
b7c6
e6e5
a6a5
h7h5
h7h6
f7f5
f7f6
g6g5
d6d5
b5b4
c8a8
c8b8
c8c1
c8c2
c8c3
c8c4
c8c5
c8c6
c8c7
c8e8
c8d8
f8d8
f8e8
g8h8
g8g7

## Board State Fen
2r2rk1/1b3p1p/p2pp1p1/1p6/4PP2/P2P1P2/1P2N1KP/1RR5 b - - 4 25
assistant
f7f6