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

EGTB: win in 4 half-moves

# move score
1 Rb1 win in 3 half-moves
2 Kb4 draw
3 Kb5 draw
4 Kb7 draw
5 Kb8 draw
6 Kc3 draw
7 Kc5 draw
8 Kc7 draw
9 Kd3 draw
10 Kd7 draw
11 Kd8 draw
12 Ra1 draw
13 Rc1 draw
14 Rd1 draw
15 Re2 draw
16 Re3 draw
17 Re7 draw
18 Re8 draw
19 Kb3 loss in 2 half-moves
20 Kd4 loss in 2 half-moves
21 Kd5 loss in 2 half-moves
22 Re4 loss in 2 half-moves
23 Re5 loss in 2 half-moves
24 Re6 loss in 2 half-moves
25 Rf1 loss in 2 half-moves
26 Rg1 loss in 2 half-moves
27 Rh1 loss in 2 half-moves