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 Ka3 draw
3 Kaa2 draw
4 Kab1 draw
5 Kba2 draw
6 Kbb1 draw
7 Kc1 draw
8 Kc2 draw
9 Ra8 draw
10 Rb7 draw
11 Rh8 draw
12 Kb3 loss in 2 half-moves
13 Kc3 loss in 2 half-moves
14 Rb4 loss in 2 half-moves
15 Rb5 loss in 2 half-moves
16 Rb6 loss in 2 half-moves
17 Rc8 loss in 2 half-moves
18 Rd8 loss in 2 half-moves
19 Re8 loss in 2 half-moves
20 Rf8 loss in 2 half-moves
21 Rg8 loss in 2 half-moves