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

EGTB: win in 4 half-moves

# move score
1 Rb5 win in 3 half-moves
2 K5b6 draw
3 K6b6 draw
4 Ka4 draw
5 Ka7 draw
6 Kb7 draw
7 Rf5 draw
8 Rg1 draw
9 Rg6 draw
10 Rg7 draw
11 Rg8 draw
12 Rh5 draw
13 K5b5 loss in 2 half-moves
14 K6b5 loss in 2 half-moves
15 Kb4 loss in 2 half-moves
16 Rc5 loss in 2 half-moves
17 Rd5 loss in 2 half-moves
18 Re5 loss in 2 half-moves
19 Rg2 loss in 2 half-moves
20 Rg3 loss in 2 half-moves
21 Rg4 loss in 2 half-moves