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

EGTB: win in 4 half-moves

# move score
1 Rb2 win in 3 half-moves
2 Rb3 win in 3 half-moves
3 Rb4 win in 3 half-moves
4 Kc1 win in 7 half-moves
5 Kc2 win in 7 half-moves
6 Ka1 draw
7 Ka4 draw
8 Kaa2 draw
9 Kab2 draw
10 Kb3 draw
11 Kb4 draw
12 Kba2 draw
13 Kbb2 draw
14 Ra8 draw
15 Rc8 draw
16 Rh8 draw
17 Rb5 loss in 2 half-moves
18 Rb6 loss in 2 half-moves
19 Rb7 loss in 2 half-moves
20 Rd8 loss in 2 half-moves
21 Re8 loss in 2 half-moves
22 Rf8 loss in 2 half-moves
23 Rg8 loss in 2 half-moves