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
a1b1
a1a2
c1b1
c1h1
c1g1
c1f1
c1e1
c1d1
c1c8
c1c7
c1c6
c1c5
c1c4
c1c3
c1c2
b2b4
b2b3
g2h3
g2h2
g2h1
g2g1
g2f1
a3a4
d3c5
d3e1
d3e5
d3b4
d3f4
f3d1
f3e2
f3h5
f3g4
f3f7
f3f6
f3f5
f3f4
g3g4
e4d2
e4d6
e4f6
e4c3
e4c5
e4g5
h4h5

## Board State Fen
1qr2rk1/4bpp1/3pp2p/pp1n4/3PN2P/P2NPQP1/1P3PK1/R1R5 w - - 1 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
a1b1
a1a2
c1b1
c1h1
c1g1
c1f1
c1e1
c1d1
c1c8
c1c7
c1c6
c1c5
c1c4
c1c3
c1c2
b2b4
b2b3
g2h3
g2h2
g2h1
g2g1
g2f1
a3a4
d3c5
d3e1
d3e5
d3b4
d3f4
f3d1
f3e2
f3h5
f3g4
f3f7
f3f6
f3f5
f3f4
g3g4
e4d2
e4d6
e4f6
e4c3
e4c5
e4g5
h4h5

## Board State Fen
1qr2rk1/4bpp1/3pp2p/pp1n4/3PN2P/P2NPQP1/1P3PK1/R1R5 w - - 1 21
assistant
e4d2