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

EGTB: win in 10 half-moves

# move score
1 Kb8 win in 9 half-moves
2 K6a7 draw
3 K6b7 draw
4 K8a7 draw
5 K8b7 draw
6 Kb6 draw
7 Ra7 draw
8 Rd7 draw
9 Re7 draw
10 Rf1 draw
11 Rf5 draw
12 Rf6 draw
13 Rf8 draw
14 Rg7 draw
15 Rh7 draw
16 Ka5 loss in 2 half-moves
17 Kb5 loss in 2 half-moves
18 Rb7 loss in 2 half-moves
19 Rc7 loss in 2 half-moves
20 Rf2 loss in 2 half-moves
21 Rf3 loss in 2 half-moves
22 Rf4 loss in 2 half-moves