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

EGTB: win in 2 half-moves

# move score
1 a3 win in 1 half-moves
2 Rb4 draw
3 Rb6 draw
4 Rb7 draw
5 Kg4 loss in 2 half-moves
6 Kg5 loss in 2 half-moves
7 Kg6 loss in 2 half-moves
8 Kh4 loss in 2 half-moves
9 Kh6 loss in 2 half-moves
10 Ra2 loss in 2 half-moves
11 Rb1 loss in 2 half-moves
12 Rb3 loss in 2 half-moves
13 Rb5 loss in 2 half-moves
14 Rb8 loss in 2 half-moves
15 Rc2 loss in 2 half-moves
16 Rd2 loss in 2 half-moves
17 Re2 loss in 2 half-moves
18 Rg2 loss in 2 half-moves
19 Rh2 loss in 2 half-moves
20 Rf2 loss in 1 half-moves