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

EGTB: win in 4 half-moves

# move score
1 Rb6 win in 3 half-moves
2 Rb7 win in 5 half-moves
3 Rb8 win in 5 half-moves
4 Ra4 draw
5 Rb1 draw
6 Rb5 draw
7 Rg4 draw
8 Rh4 draw
9 Kc7 loss in 2 half-moves
10 Kc8 loss in 2 half-moves
11 Kd6 loss in 2 half-moves
12 Kdd7 loss in 2 half-moves
13 Kde8 loss in 2 half-moves
14 Ke6 loss in 2 half-moves
15 Ked7 loss in 2 half-moves
16 Kee8 loss in 2 half-moves
17 Kf6 loss in 2 half-moves
18 Kf7 loss in 2 half-moves
19 Kf8 loss in 2 half-moves
20 Rb2 loss in 2 half-moves
21 Rb3 loss in 2 half-moves
22 Rc4 loss in 2 half-moves
23 Rd4 loss in 2 half-moves
24 Re4 loss in 2 half-moves
25 Rf4 loss in 2 half-moves