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

EGTB: win in 4 half-moves

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