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 3 half-moves
3 Rb8 win in 3 half-moves
4 Ra8 draw
5 Rc3 draw
6 Rc6 draw
7 Rd8 draw
8 Re8 draw
9 Rf8 draw
10 Ka8 loss in 6 half-moves
11 Ka6 loss in 2 half-moves
12 Kb6 loss in 2 half-moves
13 Rc1 loss in 2 half-moves
14 Rc2 loss in 2 half-moves
15 Rc4 loss in 2 half-moves
16 Rc5 loss in 2 half-moves
17 Rc7 loss in 2 half-moves
18 Rg8 loss in 2 half-moves
19 Rh8 loss in 2 half-moves