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

EGTB: win in 4 half-moves

# move score
1 Kc4 win in 3 half-moves
2 Rb8 draw
3 Re4 draw
4 Rf4 draw
5 Rg4 draw
6 Kaa2 loss in 2 half-moves
7 Kaa4 loss in 2 half-moves
8 Kab2 loss in 2 half-moves
9 Kba2 loss in 2 half-moves
10 Kba4 loss in 2 half-moves
11 Kbb2 loss in 2 half-moves
12 Kc2 loss in 2 half-moves
13 Kc3 loss in 2 half-moves
14 Ra4 loss in 2 half-moves
15 Rb5 loss in 2 half-moves
16 Rb6 loss in 2 half-moves
17 Rb7 loss in 2 half-moves
18 Rc4 loss in 2 half-moves
19 Rd4 loss in 2 half-moves
20 Rh4 loss in 2 half-moves