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

EGTB: win in 2 half-moves

# move score
1 Rb3 win in 1 half-moves
2 Kc7 draw
3 Rb5 draw
4 Rb6 draw
5 Rb7 draw
6 Rf4 draw
7 Ka7 loss in 2 half-moves
8 Ka8 loss in 2 half-moves
9 Kc8 loss in 2 half-moves
10 Kg7 loss in 2 half-moves
11 Kg8 loss in 2 half-moves
12 Kh7 loss in 2 half-moves
13 Ra4 loss in 2 half-moves
14 Rb1 loss in 2 half-moves
15 Rb2 loss in 2 half-moves
16 Rc4 loss in 2 half-moves
17 Rd4 loss in 2 half-moves
18 Re4 loss in 2 half-moves
19 Rg4 loss in 2 half-moves
20 Rh4 loss in 2 half-moves
21 Kb7 loss in 1 half-moves