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

EGTB: win in 4 half-moves

# move score
1 Rc1 win in 3 half-moves
2 Kb4 draw
3 Kb5 draw
4 Kc4 draw
5 Kd4 draw
6 Kd5 draw
7 Kd6 draw
8 Kg1 draw
9 Kg2 draw
10 Kh2 draw
11 Rc2 draw
12 Rc4 draw
13 Rd3 draw
14 Re3 draw
15 Rf3 draw
16 Rg3 draw
17 Rh3 draw
18 Kb6 loss in 2 half-moves
19 Kc6 loss in 2 half-moves
20 Ra3 loss in 2 half-moves
21 Rb3 loss in 2 half-moves