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

EGTB: win in 4 half-moves

# move score
1 Rb8 win in 3 half-moves
2 Rc8 win in 5 half-moves
3 Rd8 win in 5 half-moves
4 Rh8 win in 5 half-moves
5 Re1 draw
6 Re4 draw
7 Re5 draw
8 Re6 draw
9 Ka4 loss in 2 half-moves
10 Ka6 loss in 2 half-moves
11 Ka7 loss in 2 half-moves
12 Kb4 loss in 2 half-moves
13 Kb5 loss in 2 half-moves
14 Kb6 loss in 2 half-moves
15 Kb7 loss in 2 half-moves
16 Kb8 loss in 2 half-moves
17 Re2 loss in 2 half-moves
18 Re3 loss in 2 half-moves
19 Re7 loss in 2 half-moves
20 Rf8 loss in 2 half-moves
21 Rg8 loss in 2 half-moves