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 Ka7 win in 5 half-moves
3 Kb7 win in 15 half-moves
4 K4a5 draw
5 K4b5 draw
6 K6a5 draw
7 K6b5 draw
8 Ka3 draw
9 Kb3 draw
10 Kb4 draw
11 Kb6 draw
12 Ra8 draw
13 Rc8 draw
14 Rd8 draw
15 Re1 draw
16 Re7 draw
17 Re2 loss in 2 half-moves
18 Re3 loss in 2 half-moves
19 Re4 loss in 2 half-moves
20 Re5 loss in 2 half-moves
21 Re6 loss in 2 half-moves
22 Rf8 loss in 2 half-moves
23 Rg8 loss in 2 half-moves
24 Rh8 loss in 2 half-moves