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

EGTB: win in 4 half-moves

# move score
1 Rb1 win in 3 half-moves
2 Ra1 draw
3 Rc1 draw
4 Rd1 draw
5 Re1 draw
6 Rf1 draw
7 Rg5 draw
8 Rg6 draw
9 Rg7 draw
10 Rg8 draw
11 K4b4 loss in 2 half-moves
12 K4b5 loss in 2 half-moves
13 K5b4 loss in 2 half-moves
14 K5b5 loss in 2 half-moves
15 Ka3 loss in 2 half-moves
16 Ka6 loss in 2 half-moves
17 Kb3 loss in 2 half-moves
18 Kb6 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
22 Rh1 loss in 2 half-moves