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 Kb6 win in 3 half-moves
3 Kc1 win in 3 half-moves
4 Kc2 win in 3 half-moves
5 Ra3 win in 7 half-moves
6 Rc2 win in 7 half-moves
7 Rb3 win in 9 half-moves
8 Ka5 win in 15 half-moves
9 Ka7 draw
10 Kb7 draw
11 Kd1 draw
12 Kd3 draw
13 Ke1 draw
14 Ke2 draw
15 Rc1 draw
16 Rc4 draw
17 Rc5 draw
18 Rd3 draw
19 Re3 draw
20 Rf3 draw
21 Ke3 loss in 2 half-moves
22 Rc6 loss in 2 half-moves
23 Rc7 loss in 2 half-moves
24 Rc8 loss in 2 half-moves
25 Rg3 loss in 2 half-moves
26 Rh3 loss in 2 half-moves