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 Re8 draw
4 Rf8 draw
5 Rg8 draw
6 Rh8 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 Ra8 loss in 2 half-moves
19 Rb6 loss in 2 half-moves
20 Rb7 loss in 2 half-moves
21 Rc8 loss in 2 half-moves
22 Rd8 loss in 2 half-moves