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

EGTB: win in 4 half-moves

# move score
1 Rf4 win in 3 half-moves
2 Kf3 draw
3 Kf4 draw
4 Kf5 draw
5 Kg3 draw
6 Kg5 draw
7 Kh3 draw
8 Kh4 draw
9 Kh5 draw
10 Rb4 draw
11 Rd1 draw
12 Re4 draw
13 Ra4 loss in 2 half-moves
14 Rc4 loss in 2 half-moves
15 Rd2 loss in 2 half-moves
16 Rd3 loss in 2 half-moves
17 Rd5 loss in 2 half-moves
18 Rd6 loss in 2 half-moves
19 Rd7 loss in 2 half-moves
20 Rd8 loss in 2 half-moves