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

EGTB: win in 4 half-moves

# move score
1 Kb5 win in 3 half-moves
2 Ra6 draw
3 Rb1 draw
4 Rb2 draw
5 Rb3 draw
6 Rg6 draw
7 K5a6 loss in 2 half-moves
8 K7a6 loss in 2 half-moves
9 Ka4 loss in 2 half-moves
10 Ka8 loss in 2 half-moves
11 Kb4 loss in 2 half-moves
12 Kb7 loss in 2 half-moves
13 Kb8 loss in 2 half-moves
14 Rb4 loss in 2 half-moves
15 Rb5 loss in 2 half-moves
16 Rb7 loss in 2 half-moves
17 Rb8 loss in 2 half-moves
18 Rc6 loss in 2 half-moves
19 Rd6 loss in 2 half-moves
20 Re6 loss in 2 half-moves
21 Rf6 loss in 2 half-moves
22 Rh6 loss in 2 half-moves