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

EGTB: win in 4 half-moves

# move score
1 Kb5 win in 3 half-moves
2 Ra3 win in 3 half-moves
3 Rb3 win in 3 half-moves
4 Rd5 win in 3 half-moves
5 Rd6 win in 3 half-moves
6 Ka5 win in 5 half-moves
7 K6b6 draw
8 K6b7 draw
9 K7b6 draw
10 K7b7 draw
11 Ka8 draw
12 Kb8 draw
13 Rc3 draw
14 Rd1 draw
15 Rd2 draw
16 Rd4 draw
17 Re3 draw
18 Rf3 draw
19 Rd7 loss in 2 half-moves
20 Rd8 loss in 2 half-moves
21 Rg3 loss in 2 half-moves
22 Rh3 loss in 2 half-moves