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

EGTB: win in 4 half-moves

# move score
1 Kb6 win in 3 half-moves
2 Rd7 win in 3 half-moves
3 Rf7 win in 5 half-moves
4 Rb2 draw
5 Rb3 draw
6 Re7 draw
7 Rg7 draw
8 Rh7 draw
9 Ka6 loss in 2 half-moves
10 Ka8 loss in 2 half-moves
11 Kb8 loss in 2 half-moves
12 Rb1 loss in 2 half-moves
13 Rb4 loss in 2 half-moves
14 Rb5 loss in 2 half-moves
15 Rb6 loss in 2 half-moves
16 Rb8 loss in 2 half-moves
17 Rc7 loss in 2 half-moves