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
b1f1
b1e1
b1d1
b1c1
b1b3
b1b2
g1h2
g1h1
f2f4
f2f3
g3g4
b4a2
b4a6
b4c2
b4c6
b4d3
b4d5
e5e6
f5c2
f5d3
f5e4
f5c8
f5d7
f5e6
f5h3
f5g4
f5h7
f5g6

## Board State Fen
7k/1b3p2/7p/1p1pPBp1/rN1P4/6P1/3n1PP1/1R4K1 w - - 7 31
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
b1f1
b1e1
b1d1
b1c1
b1b3
b1b2
g1h2
g1h1
f2f4
f2f3
g3g4
b4a2
b4a6
b4c2
b4c6
b4d3
b4d5
e5e6
f5c2
f5d3
f5e4
f5c8
f5d7
f5e6
f5h3
f5g4
f5h7
f5g6

## Board State Fen
7k/1b3p2/7p/1p1pPBp1/rN1P4/6P1/3n1PP1/1R4K1 w - - 7 31
assistant
b1d1