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 Ra6 draw
3 Rc2 draw
4 Rc3 draw
5 Rc7 draw
6 Rc8 draw
7 Rd6 draw
8 Re6 draw
9 Rf6 draw
10 Kg1 loss in 2 half-moves
11 Kg3 loss in 2 half-moves
12 Kg4 loss in 2 half-moves
13 Kh4 loss in 2 half-moves
14 Rb6 loss in 2 half-moves
15 Rc4 loss in 2 half-moves
16 Rc5 loss in 2 half-moves
17 Rg6 loss in 2 half-moves
18 Rh6 loss in 2 half-moves
19 K1g2 loss in 1 half-moves
20 K1h2 loss in 1 half-moves
21 K3g2 loss in 1 half-moves
22 K3h2 loss in 1 half-moves