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

EGTB: win in 4 half-moves

# move score
1 Ra2 win in 3 half-moves
2 Ka3 draw
3 Ka4 draw
4 Ka5 draw
5 Ka7 draw
6 Kb3 draw
7 Kb8 draw
8 Kc3 draw
9 Kc4 draw
10 Kc5 draw
11 Rb2 draw
12 Rc2 draw
13 Rd2 draw
14 Rh1 draw
15 Rh3 draw
16 Rh4 draw
17 Rh5 draw
18 Rh6 draw
19 Kb5 loss in 2 half-moves
20 Kb7 loss in 2 half-moves
21 Re2 loss in 2 half-moves
22 Rf2 loss in 2 half-moves
23 Rg2 loss in 2 half-moves
24 Rh7 loss in 2 half-moves
25 Rh8 loss in 2 half-moves