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

EGTB: win in 4 half-moves

# move score
1 Rg4 win in 3 half-moves
2 Rg5 win in 3 half-moves
3 Rg6 win in 3 half-moves
4 Rg7 win in 3 half-moves
5 Ra2 draw
6 Rb2 draw
7 Rc2 draw
8 Rd2 draw
9 Rg3 draw
10 Rg8 draw
11 K5b5 loss in 2 half-moves
12 K5b6 loss in 2 half-moves
13 K6b5 loss in 2 half-moves
14 K6b6 loss in 2 half-moves
15 Ka4 loss in 2 half-moves
16 Ka7 loss in 2 half-moves
17 Kb4 loss in 2 half-moves
18 Kb7 loss in 2 half-moves
19 Re2 loss in 2 half-moves
20 Rf2 loss in 2 half-moves
21 Rg1 loss in 2 half-moves
22 Rh2 loss in 2 half-moves