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 Rb6 draw
4 Re7 draw
5 Rg7 draw
6 Rh7 draw
7 Kaa2 loss in 2 half-moves
8 Kaa4 loss in 2 half-moves
9 Kab2 loss in 2 half-moves
10 Kab4 loss in 2 half-moves
11 Kba2 loss in 2 half-moves
12 Kba4 loss in 2 half-moves
13 Kbb2 loss in 2 half-moves
14 Kbb4 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 Ra7 loss in 2 half-moves
19 Rb8 loss in 2 half-moves
20 Rc7 loss in 2 half-moves
21 Rd7 loss in 2 half-moves
22 Rf7 loss in 2 half-moves