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

EGTB: win in 4 half-moves

# move score
1 Rb4 win in 3 half-moves
2 Ka1 draw
3 Ka4 draw
4 Kaa3 draw
5 Kab2 draw
6 Kb1 draw
7 Kba3 draw
8 Kbb2 draw
9 Kc2 draw
10 Kc3 draw
11 Ra8 draw
12 Rg8 draw
13 Kb4 loss in 2 half-moves
14 Kc4 loss in 2 half-moves
15 Rb5 loss in 2 half-moves
16 Rb6 loss in 2 half-moves
17 Rb7 loss in 2 half-moves
18 Rc8 loss in 2 half-moves
19 Rd8 loss in 2 half-moves
20 Re8 loss in 2 half-moves
21 Rf8 loss in 2 half-moves
22 Rh8 loss in 2 half-moves