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 Kb8 win in 5 half-moves
3 Ka7 draw
4 Ke4 draw
5 Ke5 draw
6 Ra3 draw
7 Rb3 draw
8 Rc3 draw
9 Rd2 draw
10 Re3 draw
11 Rh3 draw
12 Kc3 loss in 2 half-moves
13 Kc4 loss in 2 half-moves
14 Kc5 loss in 2 half-moves
15 Kd5 loss in 2 half-moves
16 Rd1 loss in 2 half-moves
17 Rf3 loss in 2 half-moves
18 Rg3 loss in 2 half-moves
19 Ke3 loss in 1 half-moves