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

EGTB: win in 4 half-moves

# move score
1 Rb1 win in 3 half-moves
2 Rb2 win in 3 half-moves
3 Rb3 win in 3 half-moves
4 Rb4 win in 3 half-moves
5 Rb8 draw
6 Rc7 draw
7 Rd7 draw
8 Re7 draw
9 Rh7 draw
10 K2b2 loss in 2 half-moves
11 K2b3 loss in 2 half-moves
12 K3b2 loss in 2 half-moves
13 K3b3 loss in 2 half-moves
14 Ka1 loss in 2 half-moves
15 Ka4 loss in 2 half-moves
16 Kb1 loss in 2 half-moves
17 Kb4 loss in 2 half-moves
18 Ra7 loss in 2 half-moves
19 Rb5 loss in 2 half-moves
20 Rb6 loss in 2 half-moves
21 Rf7 loss in 2 half-moves
22 Rg7 loss in 2 half-moves