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
a5a1
a5a2
a5a3
a5a4
a5b5
a5a7
a5a6
f7f6
a8a6
a8a7
a8c8
a8b8
d8c7
d8f6
d8e7
d8b8
d8c8
d8d7
d8e8
f8e7
f8g7
g8h8
g8h7

## Board State Fen
r2q1bk1/5p2/1p1p3p/rP1PpNpP/2P1P1P1/1R2Q3/5PK1/1R6 b - - 20 41
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
a5a1
a5a2
a5a3
a5a4
a5b5
a5a7
a5a6
f7f6
a8a6
a8a7
a8c8
a8b8
d8c7
d8f6
d8e7
d8b8
d8c8
d8d7
d8e8
f8e7
f8g7
g8h8
g8h7

## Board State Fen
r2q1bk1/5p2/1p1p3p/rP1PpNpP/2P1P1P1/1R2Q3/5PK1/1R6 b - - 20 41
assistant
a5a2