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 3 half-moves
3 K1b2 draw
4 K3b2 draw
5 Rb2 draw
6 Rb7 draw
7 Rb8 draw
8 Rd6 draw
9 Rg6 draw
10 Rh6 draw
11 Ka4 loss in 2 half-moves
12 Kb1 loss in 2 half-moves
13 Kb3 loss in 2 half-moves
14 Kb4 loss in 2 half-moves
15 Ra6 loss in 2 half-moves
16 Rb4 loss in 2 half-moves
17 Rb5 loss in 2 half-moves
18 Rc6 loss in 2 half-moves
19 Re6 loss in 2 half-moves
20 Rf6 loss in 2 half-moves
21 K1a2 loss in 1 half-moves
22 K3a2 loss in 1 half-moves