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 K6a7 draw
3 K6b7 draw
4 K8a7 draw
5 K8b7 draw
6 Kb6 draw
7 Kb8 draw
8 Re1 draw
9 Rf1 draw
10 Rg1 draw
11 Rh1 draw
12 Ka5 loss in 2 half-moves
13 Kb5 loss in 2 half-moves
14 Ra2 loss in 2 half-moves
15 Ra3 loss in 2 half-moves
16 Ra4 loss in 2 half-moves
17 Rb1 loss in 2 half-moves
18 Rc1 loss in 2 half-moves
19 Rd1 loss in 2 half-moves