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
b4a3
b4a5
b4c3
b4e7
b4d6
b4c5
b4a4
b4b3
b4h4
b4g4
b4f4
b4e4
b4d4
b4c4
b4b6
b4b5
f7f5
f7f6
b7b5
b7b6
a7a5
a7a6
g6g5
d5d4
g7e5
g7f6
g7h6
g7h8
h7h5
h7h6
d8a8
d8b8
d8c8
d8d6
d8d7
d8e8
f8e8
g8h8

## Board State Fen
3r1rk1/pp3pbp/6p1/3pP3/1q6/1PN3P1/1B1Q1P1P/1R2K2R b K - 0 20
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
b4a3
b4a5
b4c3
b4e7
b4d6
b4c5
b4a4
b4b3
b4h4
b4g4
b4f4
b4e4
b4d4
b4c4
b4b6
b4b5
f7f5
f7f6
b7b5
b7b6
a7a5
a7a6
g6g5
d5d4
g7e5
g7f6
g7h6
g7h8
h7h5
h7h6
d8a8
d8b8
d8c8
d8d6
d8d7
d8e8
f8e8
g8h8

## Board State Fen
3r1rk1/pp3pbp/6p1/3pP3/1q6/1PN3P1/1B1Q1P1P/1R2K2R b K - 0 20
assistant
g7e5