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

EGTB: win in 4 half-moves

# move score
1 Re7 win in 3 half-moves
2 Re8 win in 3 half-moves
3 Kf7 draw
4 Kf8 draw
5 Kgg7 draw
6 Kgh7 draw
7 Khg7 draw
8 Khh7 draw
9 Ra3 draw
10 Re4 draw
11 Re5 draw
12 Re6 draw
13 Rf3 draw
14 Rg3 draw
15 Rh3 draw
16 Rb3 loss in 2 half-moves
17 Rc3 loss in 2 half-moves
18 Rd3 loss in 2 half-moves
19 Re1 loss in 2 half-moves
20 Re2 loss in 2 half-moves