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 Ra5 win in 7 half-moves
3 Ka1 draw
4 Ka2 draw
5 Ka3 draw
6 Kbb1 draw
7 Kbb3 draw
8 Kbc1 draw
9 Kbc3 draw
10 Kcb1 draw
11 Kcb3 draw
12 Kcc1 draw
13 Kcc3 draw
14 Kd1 draw
15 Kd2 draw
16 Kd3 draw
17 Rb4 draw
18 Rb6 draw
19 Rg5 draw
20 Rb7 loss in 2 half-moves
21 Rb8 loss in 2 half-moves
22 Rc5 loss in 2 half-moves
23 Rd5 loss in 2 half-moves
24 Re5 loss in 2 half-moves
25 Rf5 loss in 2 half-moves
26 Rh5 loss in 2 half-moves