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

EGTB: win in 2 half-moves

# move score
1 Rb8 win in 1 half-moves
2 Ka1 draw
3 Ka2 draw
4 Ka3 draw
5 Kb1 draw
6 Kb3 draw
7 Kc1 draw
8 Kc2 draw
9 Kc3 draw
10 Rb3 draw
11 Rb5 draw
12 Rb6 draw
13 Rb7 draw
14 Rc4 draw
15 Rd4 draw
16 Re4 draw
17 Rg4 draw
18 Rh4 draw
19 Ra4 loss in 2 half-moves
20 Rf4 loss in 2 half-moves