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

EGTB: win in 4 half-moves

# move score
1 Rb8 win in 3 half-moves
2 K6b6 win in 7 half-moves
3 Kb5 win in 7 half-moves
4 Ra8 win in 7 half-moves
5 Rc8 win in 7 half-moves
6 K6b7 draw
7 K7b6 draw
8 K7b7 draw
9 Ka5 draw
10 Ka8 draw
11 Kb8 draw
12 Rd2 draw
13 Rd6 draw
14 Rd7 draw
15 Rh8 draw
16 Rd1 loss in 2 half-moves
17 Rd3 loss in 2 half-moves
18 Rd4 loss in 2 half-moves
19 Rd5 loss in 2 half-moves
20 Re8 loss in 2 half-moves
21 Rf8 loss in 2 half-moves
22 Rg8 loss in 2 half-moves