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 Rg1 win in 5 half-moves
3 Rg3 win in 5 half-moves
4 Rb7 draw
5 Rc7 draw
6 Rd7 draw
7 Re7 draw
8 Rg2 draw
9 Rg5 draw
10 Rg6 draw
11 K1b2 loss in 2 half-moves
12 K1c2 loss in 2 half-moves
13 K1d2 loss in 2 half-moves
14 K3b2 loss in 2 half-moves
15 K3c2 loss in 2 half-moves
16 K3d2 loss in 2 half-moves
17 Kb1 loss in 2 half-moves
18 Kb3 loss in 2 half-moves
19 Kb4 loss in 2 half-moves
20 Kc4 loss in 2 half-moves
21 Kd1 loss in 2 half-moves
22 Kd3 loss in 2 half-moves
23 Kd4 loss in 2 half-moves
24 Ra7 loss in 2 half-moves
25 Rf7 loss in 2 half-moves
26 Rg8 loss in 2 half-moves
27 Rh7 loss in 2 half-moves