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

EGTB: win in 4 half-moves

# move score
1 Kb1 win in 3 half-moves
2 Rb1 win in 3 half-moves
3 Rb2 win in 3 half-moves
4 Ka2 draw
5 Kb2 draw
6 Kc3 draw
7 Kc4 draw
8 Ka3 loss in 2 half-moves
9 Ka4 loss in 2 half-moves
10 Ka5 loss in 2 half-moves
11 Kb5 loss in 2 half-moves
12 Kc5 loss in 2 half-moves
13 Ra3 loss in 2 half-moves
14 Rc3 loss in 2 half-moves
15 Rd3 loss in 2 half-moves
16 Re3 loss in 2 half-moves
17 Rf3 loss in 2 half-moves
18 Rg3 loss in 2 half-moves
19 Rh3 loss in 2 half-moves