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

EGTB: win in 2 half-moves

# move score
1 Rb1 win in 1 half-moves
2 Kb7 draw
3 Kc8 draw
4 Kcc7 draw
5 Kcd6 draw
6 Kd8 draw
7 Kdc7 draw
8 Kdd6 draw
9 Ke6 draw
10 Ke7 draw
11 Ke8 draw
12 Ra6 draw
13 Rb7 draw
14 Rb8 draw
15 Kb5 loss in 2 half-moves
16 Kc5 loss in 2 half-moves
17 Kd5 loss in 2 half-moves
18 Rb2 loss in 2 half-moves
19 Rb3 loss in 2 half-moves
20 Rb4 loss in 2 half-moves
21 Rb5 loss in 2 half-moves