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

EGTB: win in 4 half-moves

# move score
1 Ra5 win in 3 half-moves
2 K4a3 draw
3 Rd6 draw
4 Rf6 draw
5 Rg6 draw
6 Rh6 draw
7 Ka1 loss in 2 half-moves
8 Ka5 loss in 2 half-moves
9 Kb1 loss in 2 half-moves
10 Kb2 loss in 2 half-moves
11 Kb4 loss in 2 half-moves
12 Kb5 loss in 2 half-moves
13 Ra7 loss in 2 half-moves
14 Ra8 loss in 2 half-moves
15 Rb6 loss in 2 half-moves
16 Rc6 loss in 2 half-moves
17 Re6 loss in 2 half-moves
18 K2a3 loss in 1 half-moves
19 K2b3 loss in 1 half-moves
20 K4b3 loss in 1 half-moves