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 K4b4 draw
3 K4b5 draw
4 K5b4 draw
5 K5b5 draw
6 Kb6 draw
7 Kc6 draw
8 Ra8 draw
9 Rc6 draw
10 Rc7 draw
11 Rh8 draw
12 K4d4 loss in 2 half-moves
13 K4d5 loss in 2 half-moves
14 K5d4 loss in 2 half-moves
15 K5d5 loss in 2 half-moves
16 Kb3 loss in 2 half-moves
17 Kc3 loss in 2 half-moves
18 Kd3 loss in 2 half-moves
19 Kd6 loss in 2 half-moves
20 Rd8 loss in 2 half-moves
21 Re8 loss in 2 half-moves
22 Rf8 loss in 2 half-moves
23 Rg8 loss in 2 half-moves