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
h1d1
h1e1
h1f1
h1g1
h1h2
b2b4
b2b3
a2a1
a2a7
a2a6
a2a5
a2a4
a2a3
c1h6
c1g5
c1f4
c1e3
c1d2
e2f1
e2e1
e2d3
e2d2
e2d1
f3d5
f3e4
f3g2
f3h5
f3g4
g3g4
h3h4
c4b6
c4d2
c4d6
c4a3
c4a5
c4e3
c4e5

## Board State Fen
5rk1/pr1nbppp/4p3/2pn4/2N5/2P2BPP/RP2KP2/2B4R w - - 4 21
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
h1d1
h1e1
h1f1
h1g1
h1h2
b2b4
b2b3
a2a1
a2a7
a2a6
a2a5
a2a4
a2a3
c1h6
c1g5
c1f4
c1e3
c1d2
e2f1
e2e1
e2d3
e2d2
e2d1
f3d5
f3e4
f3g2
f3h5
f3g4
g3g4
h3h4
c4b6
c4d2
c4d6
c4a3
c4a5
c4e3
c4e5

## Board State Fen
5rk1/pr1nbppp/4p3/2pn4/2N5/2P2BPP/RP2KP2/2B4R w - - 4 21
assistant
c1d2