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
f1e1
d1c2
d1e2
d1a1
d1b1
d1c1
d1e1
d1d3
d1d2
g1h1
g1g2
h2h4
h2h3
a3a4
b3a2
b3a4
b3c2
b3c4
c3b1
c3b5
c3a2
c3a4
c3e2
c3e4
f3f4
d5b5
d5c5
d5h5
d5g5
d5f5
d5e5
d5d6

## Board State Fen
3qr1k1/5ppp/p1nr1b2/1p1R4/3P4/PBN2P2/1P3P1P/3Q1RK1 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
f1e1
d1c2
d1e2
d1a1
d1b1
d1c1
d1e1
d1d3
d1d2
g1h1
g1g2
h2h4
h2h3
a3a4
b3a2
b3a4
b3c2
b3c4
c3b1
c3b5
c3a2
c3a4
c3e2
c3e4
f3f4
d5b5
d5c5
d5h5
d5g5
d5f5
d5e5
d5d6

## Board State Fen
3qr1k1/5ppp/p1nr1b2/1p1R4/3P4/PBN2P2/1P3P1P/3Q1RK1 w - - 1 21
assistant
d5d6