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
b1a1
b1h1
b1g1
b1f1
b1e1
b1d1
b1c1
b1b8
b1b7
b1b6
b1b5
b1b4
b1b3
b1b2
f3d1
f3e2
f3a8
f3b7
f3c6
f3d5
f3e4
f3h1
f3g2
f3h5
f3g4
d4d3
f4e2
f4e6
f4g2
f4g6
f4d3
f4d5
f4h3
f4h5
g5g4
h6h5
f7f6
g8h8
g8g7
g8f8

## Board State Fen
6k1/5p2/7p/R3NBp1/3p1n2/5b1P/P1P2P1K/1r6 b - - 4 36
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
b1a1
b1h1
b1g1
b1f1
b1e1
b1d1
b1c1
b1b8
b1b7
b1b6
b1b5
b1b4
b1b3
b1b2
f3d1
f3e2
f3a8
f3b7
f3c6
f3d5
f3e4
f3h1
f3g2
f3h5
f3g4
d4d3
f4e2
f4e6
f4g2
f4g6
f4d3
f4d5
f4h3
f4h5
g5g4
h6h5
f7f6
g8h8
g8g7
g8f8

## Board State Fen
6k1/5p2/7p/R3NBp1/3p1n2/5b1P/P1P2P1K/1r6 b - - 4 36
assistant
b1f1