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

EGTB: win in 4 half-moves

# move score
1 Rb5 win in 3 half-moves
2 Kaa3 win in 5 half-moves
3 Kaa5 win in 5 half-moves
4 Kab3 win in 5 half-moves
5 Kab5 win in 5 half-moves
6 Kba3 win in 5 half-moves
7 Kba5 win in 5 half-moves
8 Kbb3 win in 5 half-moves
9 Kbb5 win in 5 half-moves
10 Kc5 win in 5 half-moves
11 Ra7 win in 5 half-moves
12 Rc7 win in 5 half-moves
13 Kc4 draw
14 Rb6 draw
15 Rb8 draw
16 Rg7 draw
17 Rh7 draw
18 Kc3 loss in 2 half-moves
19 Rd7 loss in 2 half-moves
20 Re7 loss in 2 half-moves
21 Rf7 loss in 2 half-moves