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
a2b1
a2f7
a2e6
a2d5
a2c4
a2b3
a5a4
e5b2
e5c3
e5d4
e5d6
h5h4
f6e4
f6e8
f6g4
f6d5
f6d7
f6h7
b7b5
b7b6
c7c5
c7c6
e7e6
a8a6
a8a7
a8f8
a8e8
a8d8
a8c8
a8b8
g8h8
g8g7
g8f7

## Board State Fen
r5k1/1pp1p2N/5n2/p3b2p/5p2/P2B1P2/bP3BP1/2K4R b - - 0 23
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
a2b1
a2f7
a2e6
a2d5
a2c4
a2b3
a5a4
e5b2
e5c3
e5d4
e5d6
h5h4
f6e4
f6e8
f6g4
f6d5
f6d7
f6h7
b7b5
b7b6
c7c5
c7c6
e7e6
a8a6
a8a7
a8f8
a8e8
a8d8
a8c8
a8b8
g8h8
g8g7
g8f7

## Board State Fen
r5k1/1pp1p2N/5n2/p3b2p/5p2/P2B1P2/bP3BP1/2K4R b - - 0 23
assistant
a8d8