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
a2a4
a2a3
d1c1
d1g1
d1f1
d1e1
h1e1
h1f1
h1g1
h1h3
h1h2
b1c1
b1a1
b2b4
b2b3
d2c1
d2e1
d2h6
d2g5
d2f4
d2e3
d2f2
d2e2
d2d6
d2d5
d2d4
d2d3
g2g4
g2g3
c3b5
c3d5
c3a4
c3e2
f3f4

## Board State Fen
4r3/pp3pk1/2rpbqp1/4p2p/4P2P/2N2P2/PPPQ2P1/1K1R3R 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
a2a4
a2a3
d1c1
d1g1
d1f1
d1e1
h1e1
h1f1
h1g1
h1h3
h1h2
b1c1
b1a1
b2b4
b2b3
d2c1
d2e1
d2h6
d2g5
d2f4
d2e3
d2f2
d2e2
d2d6
d2d5
d2d4
d2d3
g2g4
g2g3
c3b5
c3d5
c3a4
c3e2
f3f4

## Board State Fen
4r3/pp3pk1/2rpbqp1/4p2p/4P2P/2N2P2/PPPQ2P1/1K1R3R w - - 4 21
assistant
d2g5