Click on the third or sixth rank to set the en passant target square.

EGTB: win in 2 half-moves

# move score
1 Rc4 win in 1 half-moves
2 Kc7 draw
3 Kd7 draw
4 Ke7 draw
5 Ke8 draw
6 Ra8 draw
7 Rb8 draw
8 Rc3 draw
9 Rc5 draw
10 Rc6 draw
11 Rc7 draw
12 Rc1 loss in 2 half-moves
13 Rc2 loss in 2 half-moves