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
a5a4
c6c5
e6e5
e7f8
e7f6
e7e8
e7d8
e7d6
f7f5
f7f6
g7g5
g7g6
h7h5
h7h6
a8a6
a8a7
a8h8
a8g8
a8f8
a8e8
a8d8
a8c8
a8b8

## Board State Fen
r7/1R1bkppp/2p1p3/p7/5P2/2PB4/P4PPP/6K1 b - - 1 19
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
a5a4
c6c5
e6e5
e7f8
e7f6
e7e8
e7d8
e7d6
f7f5
f7f6
g7g5
g7g6
h7h5
h7h6
a8a6
a8a7
a8h8
a8g8
a8f8
a8e8
a8d8
a8c8
a8b8

## Board State Fen
r7/1R1bkppp/2p1p3/p7/5P2/2PB4/P4PPP/6K1 b - - 1 19
assistant
h7h6