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

EGTB: win in 4 half-moves

# move score
1 Kb3 win in 3 half-moves
2 Kb6 win in 3 half-moves
3 Kb7 win in 3 half-moves
4 Kc3 win in 3 half-moves
5 Kc7 win in 3 half-moves
6 Kd3 win in 3 half-moves
7 Kd6 win in 3 half-moves
8 Kd7 win in 3 half-moves
9 K6b5 draw
10 K6d5 draw
11 Rf5 draw
12 K4b5 loss in 2 half-moves
13 K4d5 loss in 2 half-moves
14 Kb4 loss in 2 half-moves
15 Kd4 loss in 2 half-moves
16 Ra5 loss in 2 half-moves
17 Rb5 loss in 2 half-moves
18 Rd5 loss in 2 half-moves
19 Re5 loss in 2 half-moves
20 Rg5 loss in 2 half-moves
21 Rh5 loss in 2 half-moves