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

EGTB: win in 4 half-moves

# move score
1 Rb7 win in 3 half-moves
2 K6b6 draw
3 K6b7 draw
4 K7b6 draw
5 K7b7 draw
6 Ka5 draw
7 Ka8 draw
8 Kb5 draw
9 Kb8 draw
10 Rc7 draw
11 Rd7 draw
12 Re7 draw
13 Rf2 draw
14 Rf6 draw
15 Rf8 draw
16 Rf1 loss in 2 half-moves
17 Rf3 loss in 2 half-moves
18 Rf4 loss in 2 half-moves
19 Rf5 loss in 2 half-moves
20 Rg7 loss in 2 half-moves
21 Rh7 loss in 2 half-moves