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

EGTB: win in 4 half-moves

# move score
1 Ka6 win in 3 half-moves
2 Ka8 win in 3 half-moves
3 Kab8 win in 3 half-moves
4 Kab6 draw
5 Rb3 draw
6 Rb8 draw
7 Kc6 loss in 2 half-moves
8 Kc8 loss in 2 half-moves
9 Kcb6 loss in 2 half-moves
10 Kcb8 loss in 2 half-moves
11 Kd6 loss in 2 half-moves
12 Kd7 loss in 2 half-moves
13 Kd8 loss in 2 half-moves
14 Rb1 loss in 2 half-moves
15 Rb2 loss in 2 half-moves
16 Rb4 loss in 2 half-moves
17 Rb5 loss in 2 half-moves
18 Rb6 loss in 2 half-moves