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
b2c1
b2b1
b2a2
b2a1
c2c3
d2d1
d2f2
d2e2
d2d8
d2d7
d2d6
d2d5
d2d4
d2d3
g2g4
g2g3
h2h4
h2h3
f3f4
c4b4
c4c3
c4h4
c4g4
c4f4
c4e4
c4d4
c4c8
c4c7
c4c6
c4c5

## Board State Fen
8/1r3pk1/6p1/7p/1pR5/4rP2/1KPR2PP/8 w - - 5 40
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
b2c1
b2b1
b2a2
b2a1
c2c3
d2d1
d2f2
d2e2
d2d8
d2d7
d2d6
d2d5
d2d4
d2d3
g2g4
g2g3
h2h4
h2h3
f3f4
c4b4
c4c3
c4h4
c4g4
c4f4
c4e4
c4d4
c4c8
c4c7
c4c6
c4c5

## Board State Fen
8/1r3pk1/6p1/7p/1pR5/4rP2/1KPR2PP/8 w - - 5 40
assistant
h2h4