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

EGTB: win in 4 half-moves

# move score
1 Kb7 win in 3 half-moves
2 Ra8 draw
3 Rb2 draw
4 Rb3 draw
5 Rb4 draw
6 Kc6 loss in 2 half-moves
7 Kcc7 loss in 2 half-moves
8 Kcd8 loss in 2 half-moves
9 Kd6 loss in 2 half-moves
10 Kdc7 loss in 2 half-moves
11 Kdd8 loss in 2 half-moves
12 Ke6 loss in 2 half-moves
13 Ke7 loss in 2 half-moves
14 Ke8 loss in 2 half-moves
15 Rb1 loss in 2 half-moves
16 Rb5 loss in 2 half-moves
17 Rb6 loss in 2 half-moves
18 Rb7 loss in 2 half-moves