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
a1h1
a1g1
a1f1
a1e1
a1d1
a1c1
a1b1
a1a2
c2c1
c2c3
b2b4
b2b3
d2e4
d2b1
d2b3
d2f1
e2f1
e2e1
e2d3
e2d1
g2g4
g2g3
h2h4
h2h3
a3a4
e3e4
f3e1
f3e5
f3g1
f3g5
f3d4
f3h4
c4a2
c4b3
c4a6
c4b5
c4d3
c4e6
c4d5

## Board State Fen
r6r/pp1bk1p1/2n1pb1p/5p2/2B5/P3PN2/1PRNKPPP/R7 w - - 4 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
a1h1
a1g1
a1f1
a1e1
a1d1
a1c1
a1b1
a1a2
c2c1
c2c3
b2b4
b2b3
d2e4
d2b1
d2b3
d2f1
e2f1
e2e1
e2d3
e2d1
g2g4
g2g3
h2h4
h2h3
a3a4
e3e4
f3e1
f3e5
f3g1
f3g5
f3d4
f3h4
c4a2
c4b3
c4a6
c4b5
c4d3
c4e6
c4d5

## Board State Fen
r6r/pp1bk1p1/2n1pb1p/5p2/2B5/P3PN2/1PRNKPPP/R7 w - - 4 19
assistant
d2b3