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
d1a1
d1b1
d1c1
d1h1
d1g1
d1f1
d1e1
d1d4
d1d3
d1d2
a2a4
a2a3
c2b1
c2a4
c2b3
c2d3
f2g2
f2g1
f2f1
f2e3
f2e2
f2e1
f3f4
g3g4
c4a4
c4b4
c4c3
c4d4
c4c5
e4f5
g5c1
g5d2
g5e3
g5f4
g5d8
g5e7
g5f6
g5h4

## Board State Fen
4r1kb/2p4p/1p1p2pP/pPnPrpB1/2R1P3/5PP1/P1B2K2/3R4 w - - 2 45
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
d1a1
d1b1
d1c1
d1h1
d1g1
d1f1
d1e1
d1d4
d1d3
d1d2
a2a4
a2a3
c2b1
c2a4
c2b3
c2d3
f2g2
f2g1
f2f1
f2e3
f2e2
f2e1
f3f4
g3g4
c4a4
c4b4
c4c3
c4d4
c4c5
e4f5
g5c1
g5d2
g5e3
g5f4
g5d8
g5e7
g5f6
g5h4

## Board State Fen
4r1kb/2p4p/1p1p2pP/pPnPrpB1/2R1P3/5PP1/P1B2K2/3R4 w - - 2 45
assistant
g5f4