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

EGTB: win in 4 half-moves

# move score
1 Rb8 win in 3 half-moves
2 Kb5 win in 5 half-moves
3 K6b6 win in 7 half-moves
4 K6b7 win in 7 half-moves
5 Rc8 win in 7 half-moves
6 Rg8 win in 7 half-moves
7 Rh8 win in 7 half-moves
8 Ka5 win in 9 half-moves
9 K7b6 draw
10 K7b7 draw
11 Kb8 draw
12 Rd8 loss in 2 half-moves
13 Re8 loss in 2 half-moves
14 Rf8 loss in 2 half-moves