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

EGTB: win in 2 half-moves

# move score
1 Rc1 win in 1 half-moves
2 Kd7 draw
3 Rc2 draw
4 Rc5 draw
5 Rc6 draw
6 Rc7 draw
7 Kc7 loss in 14 half-moves
8 Ke7 loss in 12 half-moves
9 Ke8 loss in 10 half-moves
10 Ra8 loss in 2 half-moves
11 Rb8 loss in 2 half-moves
12 Rc3 loss in 2 half-moves
13 Rc4 loss in 2 half-moves