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 Kc7 win in 3 half-moves
3 Rc7 win in 3 half-moves
4 Rc8 win in 3 half-moves
5 Kc8 draw
6 Ra6 draw
7 Rc4 draw
8 Rc5 draw
9 Rh6 draw
10 Ka7 loss in 2 half-moves
11 Ka8 loss in 2 half-moves
12 Rb6 loss in 2 half-moves
13 Rc1 loss in 2 half-moves
14 Rc2 loss in 2 half-moves
15 Rd6 loss in 2 half-moves
16 Re6 loss in 2 half-moves
17 Rf6 loss in 2 half-moves
18 Rg6 loss in 2 half-moves
19 Rc3 loss in 1 half-moves