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
f1b1
f1c1
f1d1
f1e1
b2b4
b2b3
a1e1
a1d1
a1c1
a1b1
a2a4
a2a3
g1h2
g1h1
d2c1
d2e1
d2c2
d2d1
d2e2
d2d3
f2f4
f2f3
g2f3
g2h1
c3c4
e3h6
e3g5
e3f4
g3g4
h3h4
d4c2
d4c6
d4e2
d4e6
d4b3
d4b5
d4f3
d4f5
e4e5

## Board State Fen
2r2rk1/1pqb1p1p/p1nppbp1/8/3NP3/2P1B1PP/PP1Q1PB1/R4RK1 w - - 3 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
f1b1
f1c1
f1d1
f1e1
b2b4
b2b3
a1e1
a1d1
a1c1
a1b1
a2a4
a2a3
g1h2
g1h1
d2c1
d2e1
d2c2
d2d1
d2e2
d2d3
f2f4
f2f3
g2f3
g2h1
c3c4
e3h6
e3g5
e3f4
g3g4
h3h4
d4c2
d4c6
d4e2
d4e6
d4b3
d4b5
d4f3
d4f5
e4e5

## Board State Fen
2r2rk1/1pqb1p1p/p1nppbp1/8/3NP3/2P1B1PP/PP1Q1PB1/R4RK1 w - - 3 15
assistant
d4e2