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

EGTB: win in 6 half-moves

# move score
1 Ra4 win in 5 half-moves
2 Ka2 draw
3 Kab1 draw
4 Kab2 draw
5 Kc2 draw
6 Kcb1 draw
7 Kcb2 draw
8 Kd1 draw
9 Kd2 draw
10 Rb1 draw
11 Rb2 draw
12 Rb3 draw
13 Rb5 draw
14 Rb6 draw
15 Rf4 draw
16 Rg4 draw
17 Rh4 draw
18 Rb7 loss in 2 half-moves
19 Rb8 loss in 2 half-moves
20 Rc4 loss in 2 half-moves
21 Rd4 loss in 2 half-moves
22 Re4 loss in 2 half-moves