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

EGTB: win in 4 half-moves

# move score
1 Rb8 win in 3 half-moves
2 Ka2 draw
3 Ka4 draw
4 Ka5 draw
5 Ka7 draw
6 Kb6 draw
7 Kb7 draw
8 Ra8 draw
9 Rc8 draw
10 Rd1 draw
11 Rd5 draw
12 Rd6 draw
13 Rd7 draw
14 Rh8 draw
15 Kb2 loss in 2 half-moves
16 Kb3 loss in 2 half-moves
17 Kb4 loss in 2 half-moves
18 Kb5 loss in 2 half-moves
19 Rd2 loss in 2 half-moves
20 Rd3 loss in 2 half-moves
21 Rd4 loss in 2 half-moves
22 Re8 loss in 2 half-moves
23 Rf8 loss in 2 half-moves
24 Rg8 loss in 2 half-moves