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
b2b4
b2b3
a2a4
a2a3
h1f1
h1g1
h1h3
h1h2
e1f2
e1d1
b1d3
b1c2
b1d1
b1c1
d2c4
d2e4
d2b3
d2f1
c3c4
e3e4
g3f1
g3f5
g3h5
g3e2
g3e4
d4c5
f4b8
f4c7
f4d6
f4e5
f4h6
f4g5
g4g5
h4h5

## Board State Fen
2r1kb1r/pp1n1ppp/4pn2/q1pp4/3P1BPP/2PbPPN1/PP1N4/RQ2K2R w KQk - 0 15
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
b2b4
b2b3
a2a4
a2a3
h1f1
h1g1
h1h3
h1h2
e1f2
e1d1
b1d3
b1c2
b1d1
b1c1
d2c4
d2e4
d2b3
d2f1
c3c4
e3e4
g3f1
g3f5
g3h5
g3e2
g3e4
d4c5
f4b8
f4c7
f4d6
f4e5
f4h6
f4g5
g4g5
h4h5

## Board State Fen
2r1kb1r/pp1n1ppp/4pn2/q1pp4/3P1BPP/2PbPPN1/PP1N4/RQ2K2R w KQk - 0 15
assistant
b1d3