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

EGTB: win in 4 half-moves

# move score
1 Kb7 win in 3 half-moves
2 Ka7 draw
3 Kb8 draw
4 Kd6 draw
5 Ke6 draw
6 Rc1 draw
7 Rc2 draw
8 Rc3 draw
9 Rc4 draw
10 Rc6 draw
11 Kc4 loss in 2 half-moves
12 Kd4 loss in 2 half-moves
13 Ke4 loss in 2 half-moves
14 Ke5 loss in 2 half-moves
15 Ra5 loss in 2 half-moves
16 Rb5 loss in 2 half-moves
17 Rc7 loss in 2 half-moves
18 Rc8 loss in 2 half-moves
19 Kc6 loss in 1 half-moves