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

EGTB: win in 2 half-moves

# move score
1 Rb4 win in 1 half-moves
2 Ka7 draw
3 Kb7 draw
4 Kb8 draw
5 Ra4 draw
6 Rc4 draw
7 Rd4 draw
8 Re4 draw
9 Rf1 draw
10 Rf7 draw
11 Rf8 draw
12 Rf2 loss in 2 half-moves
13 Rf3 loss in 2 half-moves
14 Rf5 loss in 2 half-moves
15 Rf6 loss in 2 half-moves
16 Rg4 loss in 2 half-moves
17 Rh4 loss in 2 half-moves