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

EGTB: win in 4 half-moves

# move score
1 Rh6 win in 3 half-moves
2 Rh7 win in 3 half-moves
3 Rh8 win in 3 half-moves
4 Ra4 win in 5 half-moves
5 Rb4 win in 5 half-moves
6 Ka6 draw
7 Kaa8 draw
8 Kab7 draw
9 Kb6 draw
10 Kba8 draw
11 Kbb7 draw
12 Kc7 draw
13 Kc8 draw
14 Rf4 draw
15 Rg4 draw
16 Rh3 draw
17 Rh5 draw
18 Rc4 loss in 2 half-moves
19 Rd4 loss in 2 half-moves
20 Re4 loss in 2 half-moves
21 Rh1 loss in 2 half-moves
22 Rh2 loss in 2 half-moves