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
a1a2
b1a2
b1h7
b1g6
b1f5
b1e4
b1d3
b1c2
b1e1
b1d1
b1c1
f1c1
f1d1
f1e1
g1h2
g1h1
b2b4
b2b3
d2c4
d2e4
d2b3
d2f3
f2f4
f2f3
a3a4
c3c4
e3e4
d4c5
h4g6
h4f3
h4f5

## Board State Fen
2r1k2r/pp3p2/1qn1pb2/2pp3p/3P2pN/P1P1P1P1/1P1N1PP1/RQ3RK1 w k - 2 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
a1a2
b1a2
b1h7
b1g6
b1f5
b1e4
b1d3
b1c2
b1e1
b1d1
b1c1
f1c1
f1d1
f1e1
g1h2
g1h1
b2b4
b2b3
d2c4
d2e4
d2b3
d2f3
f2f4
f2f3
a3a4
c3c4
e3e4
d4c5
h4g6
h4f3
h4f5

## Board State Fen
2r1k2r/pp3p2/1qn1pb2/2pp3p/3P2pN/P1P1P1P1/1P1N1PP1/RQ3RK1 w k - 2 19
assistant
b2b4