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

EGTB: win in 4 half-moves

# move score
1 Rb4 win in 3 half-moves
2 Kc3 draw
3 Kc5 draw
4 Kd3 draw
5 Kd5 draw
6 Ke3 draw
7 Ke4 draw
8 Ke5 draw
9 Rc2 draw
10 Rc3 draw
11 Rc5 draw
12 Rc7 draw
13 Rc8 draw
14 Ra4 loss in 2 half-moves
15 Rc1 loss in 2 half-moves
16 Rc6 loss in 2 half-moves