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
c5c4
f6f5
e7d6
e7f8
f7g8
f7g6
f7f8
f7e8
f7e6
g7g5
g7g6
h7h5
h7h6
a8a1
a8a2
a8a3
a8a4
a8a5
a8a6
a8a7
a8c8
a8b8
d8b8
d8c8
d8d1
d8d2
d8d3
d8d4
d8d5
d8d6
d8d7
d8h8
d8g8
d8f8
d8e8

## Board State Fen
r2r4/4bkpp/5p2/1pp1p3/4P3/4B2P/1PP1KPP1/R3R3 b - - 4 26
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
c5c4
f6f5
e7d6
e7f8
f7g8
f7g6
f7f8
f7e8
f7e6
g7g5
g7g6
h7h5
h7h6
a8a1
a8a2
a8a3
a8a4
a8a5
a8a6
a8a7
a8c8
a8b8
d8b8
d8c8
d8d1
d8d2
d8d3
d8d4
d8d5
d8d6
d8d7
d8h8
d8g8
d8f8
d8e8

## Board State Fen
r2r4/4bkpp/5p2/1pp1p3/4P3/4B2P/1PP1KPP1/R3R3 b - - 4 26
assistant
c5c4