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

EGTB: win in 4 half-moves

# move score
1 Kb4 win in 3 half-moves
2 Rb4 win in 3 half-moves
3 Rb5 win in 3 half-moves
4 Rb6 win in 3 half-moves
5 Rb7 win in 3 half-moves
6 K5b5 draw
7 K5b6 draw
8 K6b5 draw
9 K6b6 draw
10 Ka4 draw
11 Ka7 draw
12 Kb7 draw
13 Ra3 draw
14 Rb8 draw
15 Rf3 draw
16 Rb1 loss in 2 half-moves
17 Rb2 loss in 2 half-moves
18 Rc3 loss in 2 half-moves
19 Rd3 loss in 2 half-moves
20 Re3 loss in 2 half-moves
21 Rg3 loss in 2 half-moves
22 Rh3 loss in 2 half-moves