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

EGTB: win in 4 half-moves

# move score
1 Rb7 win in 3 half-moves
2 Kd8 draw
3 Kg8 draw
4 Ra8 draw
5 Rb1 draw
6 Rb2 draw
7 Rb6 draw
8 Rc8 draw
9 Kd7 loss in 2 half-moves
10 Kee7 loss in 2 half-moves
11 Kef7 loss in 2 half-moves
12 Kfe7 loss in 2 half-moves
13 Kff7 loss in 2 half-moves
14 Kg7 loss in 2 half-moves
15 Rb3 loss in 2 half-moves
16 Rb4 loss in 2 half-moves
17 Rb5 loss in 2 half-moves
18 Rd8 loss in 2 half-moves