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

EGTB: win in 4 half-moves

# move score
1 Ra4 win in 3 half-moves
2 Rb4 win in 3 half-moves
3 K1b1 draw
4 K1b2 draw
5 K2b1 draw
6 K2b2 draw
7 Ka3 draw
8 Kb3 draw
9 Rc4 draw
10 Rd4 draw
11 Rh1 draw
12 Rh2 draw
13 Rh3 draw
14 Rh5 draw
15 Rh6 draw
16 Re4 loss in 2 half-moves
17 Rf4 loss in 2 half-moves
18 Rg4 loss in 2 half-moves
19 Rh7 loss in 2 half-moves
20 Rh8 loss in 2 half-moves