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

EGTB: win in 4 half-moves

# move score
1 Rb4 win in 3 half-moves
2 Rb5 draw
3 Rc8 draw
4 Rd8 draw
5 Re8 draw
6 Rg8 draw
7 Ka1 loss in 2 half-moves
8 Ka4 loss in 2 half-moves
9 Kaa3 loss in 2 half-moves
10 Kab2 loss in 2 half-moves
11 Kb1 loss in 2 half-moves
12 Kb4 loss in 2 half-moves
13 Kba3 loss in 2 half-moves
14 Kbb2 loss in 2 half-moves
15 Kc2 loss in 2 half-moves
16 Kc3 loss in 2 half-moves
17 Kc4 loss in 2 half-moves
18 Ra8 loss in 2 half-moves
19 Rb6 loss in 2 half-moves
20 Rb7 loss in 2 half-moves
21 Rf8 loss in 2 half-moves
22 Rh8 loss in 2 half-moves