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

EGTB: win in 4 half-moves

# move score
1 Rb3 win in 3 half-moves
2 Rb5 win in 3 half-moves
3 Kg4 win in 5 half-moves
4 Rb4 win in 5 half-moves
5 Ke3 draw
6 Ke4 draw
7 Kf3 draw
8 Kg3 draw
9 Ra8 draw
10 Rb2 draw
11 Rc8 draw
12 Re8 draw
13 Rg8 draw
14 Rh8 draw
15 Ke5 loss in 2 half-moves
16 Kf5 loss in 2 half-moves
17 Kg5 loss in 2 half-moves
18 Rb6 loss in 2 half-moves
19 Rb7 loss in 2 half-moves
20 Rf8 loss in 2 half-moves
21 Rb1 loss in 1 half-moves
22 Rd8 loss in 1 half-moves