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 Ka2 draw
3 Ka4 draw
4 Ka6 draw
5 Kb1 draw
6 Kb2 draw
7 Kb4 draw
8 Kb5 draw
9 Kb6 draw
10 Ra8 draw
11 Rc8 draw
12 Rd8 draw
13 Re3 draw
14 Re4 draw
15 Re5 draw
16 Re6 draw
17 Re7 draw
18 Re1 loss in 2 half-moves
19 Re2 loss in 2 half-moves
20 Rf8 loss in 2 half-moves
21 Rg8 loss in 2 half-moves
22 Rh8 loss in 2 half-moves