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

EGTB: win in 4 half-moves

# move score
1 Re1 win in 3 half-moves
2 Ra5 draw
3 Ra6 draw
4 Ra7 draw
5 Ra8 draw
6 Rd1 draw
7 Ke1 loss in 2 half-moves
8 Ke2 loss in 2 half-moves
9 Kf3 loss in 2 half-moves
10 Kff2 loss in 2 half-moves
11 Kfg1 loss in 2 half-moves
12 Kg3 loss in 2 half-moves
13 Kgf2 loss in 2 half-moves
14 Kgg1 loss in 2 half-moves
15 Kh1 loss in 2 half-moves
16 Kh2 loss in 2 half-moves
17 Kh3 loss in 2 half-moves
18 Ra2 loss in 2 half-moves
19 Ra3 loss in 2 half-moves
20 Ra4 loss in 2 half-moves
21 Rb1 loss in 2 half-moves
22 Rc1 loss in 2 half-moves