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

EGTB: win in 4 half-moves

# move score
1 Rb6 win in 3 half-moves
2 K5b5 draw
3 K5b6 draw
4 K6b5 draw
5 K6b6 draw
6 Ka4 draw
7 Ka7 draw
8 Kb4 draw
9 Kb7 draw
10 Rc6 draw
11 Rd6 draw
12 Re1 draw
13 Re5 draw
14 Re7 draw
15 Re8 draw
16 Re2 loss in 2 half-moves
17 Re3 loss in 2 half-moves
18 Re4 loss in 2 half-moves
19 Rf6 loss in 2 half-moves
20 Rg6 loss in 2 half-moves
21 Rh6 loss in 2 half-moves