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
c1a1
c1b1
c1c2
d1a4
d1b3
d1c2
d1h5
d1g4
d1f3
d1e2
d1f1
d1e1
g1h2
g1h1
g1f1
b2b4
b2b3
d2e1
f2f4
f2f3
g2g4
g2g3
c3b1
c3b5
c3d5
c3a2
c3a4
c3e2
c3e4
e3e4
h3h4
c4a2
c4b3
c4a6
c4b5
c4f1
c4e2
c4d3
c4d5

## Board State Fen
q2r2k1/4bpp1/1pp1pn1p/3n4/2BP4/2N1P2P/1P1B1PP1/2RQ2K1 w - - 0 18
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
c1a1
c1b1
c1c2
d1a4
d1b3
d1c2
d1h5
d1g4
d1f3
d1e2
d1f1
d1e1
g1h2
g1h1
g1f1
b2b4
b2b3
d2e1
f2f4
f2f3
g2g4
g2g3
c3b1
c3b5
c3d5
c3a2
c3a4
c3e2
c3e4
e3e4
h3h4
c4a2
c4b3
c4a6
c4b5
c4f1
c4e2
c4d3
c4d5

## Board State Fen
q2r2k1/4bpp1/1pp1pn1p/3n4/2BP4/2N1P2P/1P1B1PP1/2RQ2K1 w - - 0 18
assistant
c4d3