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

EGTB: win in 4 half-moves

# move score
1 Rb1 win in 3 half-moves
2 Rb3 win in 5 half-moves
3 Rh8 win in 5 half-moves
4 K1g1 draw
5 K1g2 draw
6 K2g1 draw
7 K2g2 draw
8 Ra8 draw
9 Rb2 draw
10 Rb4 draw
11 Rc8 draw
12 Rd8 draw
13 Kg3 loss in 2 half-moves
14 Kh3 loss in 2 half-moves
15 Rb5 loss in 2 half-moves
16 Rb6 loss in 2 half-moves
17 Rb7 loss in 2 half-moves
18 Re8 loss in 2 half-moves
19 Rf8 loss in 2 half-moves
20 Rg8 loss in 2 half-moves