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

EGTB: win in 4 half-moves

# move score
1 Rb8 win in 3 half-moves
2 Rb6 win in 5 half-moves
3 Ra4 draw
4 Rb1 draw
5 Rb5 draw
6 Rb7 draw
7 Re4 draw
8 Rf4 draw
9 Rg4 draw
10 K7g7 loss in 2 half-moves
11 K7g8 loss in 2 half-moves
12 K8g7 loss in 2 half-moves
13 K8g8 loss in 2 half-moves
14 Kg6 loss in 2 half-moves
15 Kh6 loss in 2 half-moves
16 Rb2 loss in 2 half-moves
17 Rb3 loss in 2 half-moves
18 Rc4 loss in 2 half-moves
19 Rd4 loss in 2 half-moves
20 Rh4 loss in 2 half-moves