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

EGTB: win in 4 half-moves

# move score
1 Ka5 win in 3 half-moves
2 Kb5 win in 3 half-moves
3 Rb5 win in 3 half-moves
4 K6b6 draw
5 K6b7 draw
6 K7b6 draw
7 K7b7 draw
8 Ka8 draw
9 Kb8 draw
10 Ra4 draw
11 Rb1 draw
12 Rb2 draw
13 Rb3 draw
14 Rb6 draw
15 Rc4 draw
16 Rg4 draw
17 Rb7 loss in 2 half-moves
18 Rb8 loss in 2 half-moves
19 Rd4 loss in 2 half-moves
20 Re4 loss in 2 half-moves
21 Rf4 loss in 2 half-moves
22 Rh4 loss in 2 half-moves