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

EGTB: win in 2 half-moves

# move score
1 Rg4 win in 1 half-moves
2 Kb3 draw
3 Kb4 draw
4 Kc3 draw
5 Kd3 draw
6 Kd4 draw
7 Kd5 draw
8 Rd4 draw
9 Re5 draw
10 Re8 draw
11 Rf4 draw
12 Kb5 loss in 2 half-moves
13 Kc5 loss in 2 half-moves
14 Re1 loss in 2 half-moves
15 Re2 loss in 2 half-moves
16 Re3 loss in 2 half-moves
17 Re6 loss in 2 half-moves
18 Re7 loss in 2 half-moves
19 Rh4 loss in 2 half-moves