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

EGTB: win in 4 half-moves

# move score
1 Ra8 win in 3 half-moves
2 Ra7 win in 5 half-moves
3 Ra5 win in 7 half-moves
4 Ka2 win in 25 half-moves
5 Ra6 draw
6 Rg4 draw
7 Rh4 draw
8 Kb2 loss in 2 half-moves
9 Kc1 loss in 2 half-moves
10 Kc2 loss in 2 half-moves
11 R1a2 loss in 2 half-moves
12 R1a3 loss in 2 half-moves
13 R4a2 loss in 2 half-moves
14 R4a3 loss in 2 half-moves
15 Rb4 loss in 2 half-moves
16 Rc4 loss in 2 half-moves
17 Rd4 loss in 2 half-moves
18 Re4 loss in 2 half-moves
19 Rf4 loss in 2 half-moves