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

EGTB: win in 4 half-moves

# move score
1 Rb3 win in 3 half-moves
2 Ka1 draw
3 Ka2 draw
4 Ka3 draw
5 Kbb1 draw
6 Kbb3 draw
7 Kbc1 draw
8 Kbc3 draw
9 Kcb1 draw
10 Kcb3 draw
11 Kcc1 draw
12 Kcc3 draw
13 Kd1 draw
14 Kd2 draw
15 Kd3 draw
16 Ra8 draw
17 Rb4 draw
18 Rc8 draw
19 Rg8 draw
20 Rb5 loss in 2 half-moves
21 Rb6 loss in 2 half-moves
22 Rb7 loss in 2 half-moves
23 Rd8 loss in 2 half-moves
24 Re8 loss in 2 half-moves
25 Rf8 loss in 2 half-moves
26 Rh8 loss in 2 half-moves