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
f1a1
f1b1
f1c1
f1d1
f1e1
f1f2
g1h1
f3f4
g3g4
d4c4
d4d1
d4d2
d4d3
d4g4
d4f4
d4e4
d4d8
d4d7
d4d6
d4d5

## Board State Fen
6k1/5pp1/8/1p2r2p/1P1R3P/5PP1/1r6/5RK1 w - - 1 36
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
f1a1
f1b1
f1c1
f1d1
f1e1
f1f2
g1h1
f3f4
g3g4
d4c4
d4d1
d4d2
d4d3
d4g4
d4f4
d4e4
d4d8
d4d7
d4d6
d4d5

## Board State Fen
6k1/5pp1/8/1p2r2p/1P1R3P/5PP1/1r6/5RK1 w - - 1 36
assistant
f1f2