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 Ra8 draw
3 Rc8 draw
4 Rd1 draw
5 Rd3 draw
6 Rd4 draw
7 Rd5 draw
8 Rg8 draw
9 Rh8 draw
10 K5b5 loss in 2 half-moves
11 K5b6 loss in 2 half-moves
12 K6b5 loss in 2 half-moves
13 K6b6 loss in 2 half-moves
14 Ka4 loss in 2 half-moves
15 Ka7 loss in 2 half-moves
16 Kb4 loss in 2 half-moves
17 Kb7 loss in 2 half-moves
18 Rd2 loss in 2 half-moves
19 Rd6 loss in 2 half-moves
20 Rd7 loss in 2 half-moves
21 Re8 loss in 2 half-moves
22 Rf8 loss in 2 half-moves