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

EGTB: win in 4 half-moves

# move score
1 Rb7 win in 3 half-moves
2 Kc5 win in 7 half-moves
3 Kc6 win in 9 half-moves
4 Ra8 win in 9 half-moves
5 Ka1 draw
6 Ka3 draw
7 Ka5 draw
8 Ka6 draw
9 Ka7 draw
10 Kb1 draw
11 Kb2 draw
12 Kb3 draw
13 Kb5 draw
14 Kb7 draw
15 Kc7 draw
16 Rc8 draw
17 Rh8 draw
18 Rd8 loss in 2 half-moves
19 Re8 loss in 2 half-moves
20 Rf8 loss in 2 half-moves
21 Rg8 loss in 2 half-moves