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

EGTB: win in 4 half-moves

# move score
1 Rb1 win in 3 half-moves
2 Kd7 win in 13 half-moves
3 Rb5 win in 13 half-moves
4 Rb7 win in 13 half-moves
5 Rd8 win in 13 half-moves
6 Rb6 win in 15 half-moves
7 Kb5 win in 17 half-moves
8 Ra8 win in 17 half-moves
9 Rc8 win in 17 half-moves
10 Rh8 win in 17 half-moves
11 Kb6 win in 19 half-moves
12 Kc7 win in 19 half-moves
13 Kb7 win in 21 half-moves
14 Kc5 loss in 2 half-moves
15 Kd5 loss in 2 half-moves
16 Kd6 loss in 2 half-moves
17 Rb2 loss in 2 half-moves
18 Rb3 loss in 2 half-moves
19 Rb4 loss in 2 half-moves
20 Re8 loss in 2 half-moves
21 Rf8 loss in 2 half-moves
22 Rg8 loss in 2 half-moves