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

EGTB: win in 4 half-moves

# move score
1 Rb3 win in 3 half-moves
2 Rc3 draw
3 Rd5 draw
4 Rd6 draw
5 Rd7 draw
6 Rd8 draw
7 Rg3 draw
8 Rh3 draw
9 K2b2 loss in 2 half-moves
10 K2b3 loss in 2 half-moves
11 K3b2 loss in 2 half-moves
12 K3b3 loss in 2 half-moves
13 Ka1 loss in 2 half-moves
14 Ka4 loss in 2 half-moves
15 Kb1 loss in 2 half-moves
16 Kb4 loss in 2 half-moves
17 Rd1 loss in 2 half-moves
18 Rd2 loss in 2 half-moves
19 Rd4 loss in 2 half-moves
20 Re3 loss in 2 half-moves
21 Rf3 loss in 2 half-moves