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
c2b4
c2a1
c2a3
c2e1
c2e3
d3e3
d3e2
d3d2
d3c3
f3e3
f3f1
f3f2
f3h3
f3g3
f3f6
f3f5
f3f4
d4d5
e4e5

## Board State Fen
8/1p6/p1p2pk1/P7/1r1PP3/3K1R2/1rN5/8 w - - 0 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
c2b4
c2a1
c2a3
c2e1
c2e3
d3e3
d3e2
d3d2
d3c3
f3e3
f3f1
f3f2
f3h3
f3g3
f3f6
f3f5
f3f4
d4d5
e4e5

## Board State Fen
8/1p6/p1p2pk1/P7/1r1PP3/3K1R2/1rN5/8 w - - 0 45
assistant
c2b4