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

EGTB: win in 2 half-moves

# move score
1 Rb8 win in 1 half-moves
2 Kb5 draw
3 Kc3 draw
4 Kc5 draw
5 Kd5 draw
6 Kf7 draw
7 Kf8 draw
8 Kg7 draw
9 Kh7 draw
10 Kh8 draw
11 Ra4 draw
12 Rb2 draw
13 Rb3 draw
14 Rb5 draw
15 Rb6 draw
16 Rb7 draw
17 Kb3 loss in 2 half-moves
18 Kd3 loss in 2 half-moves
19 Kd4 loss in 2 half-moves
20 Rb1 loss in 1 half-moves