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

EGTB: win in 2 half-moves

# move score
1 Ra4 win in 1 half-moves
2 Kf3 draw
3 Kf4 draw
4 Kg3 draw
5 Kh3 draw
6 Kh4 draw
7 Rb4 draw
8 Rc4 draw
9 Rd4 draw
10 Re1 draw
11 Re3 draw
12 Re5 draw
13 Re6 draw
14 Kf5 loss in 2 half-moves
15 Kg5 loss in 2 half-moves
16 Kh5 loss in 2 half-moves
17 Re2 loss in 2 half-moves
18 Re7 loss in 2 half-moves
19 Re8 loss in 2 half-moves
20 Rf4 loss in 2 half-moves