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

EGTB: win in 4 half-moves

# move score
1 Kb1 win in 3 half-moves
2 Kb4 win in 3 half-moves
3 Kc4 win in 3 half-moves
4 Kd1 win in 3 half-moves
5 Kd3 win in 3 half-moves
6 Kd4 win in 3 half-moves
7 Rb4 win in 3 half-moves
8 Rb1 win in 9 half-moves
9 Rb5 win in 11 half-moves
10 K1b2 draw
11 K1c2 draw
12 K1d2 draw
13 K3b2 draw
14 K3c2 draw
15 K3d2 draw
16 Ra3 draw
17 Rb2 draw
18 Rb6 draw
19 Rb7 loss in 2 half-moves
20 Rb8 loss in 2 half-moves