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

EGTB: win in 4 half-moves

# move score
1 Kb2 win in 3 half-moves
2 Ra3 win in 3 half-moves
3 Rb3 win in 3 half-moves
4 Rc4 win in 5 half-moves
5 Ka2 draw
6 Kb1 draw
7 Kb4 draw
8 Kb5 draw
9 Kb6 draw
10 Kc4 draw
11 Kc6 draw
12 Kd4 draw
13 Kd5 draw
14 Kd6 draw
15 Rd3 draw
16 Re3 draw
17 Rc1 loss in 2 half-moves
18 Rc2 loss in 2 half-moves
19 Rf3 loss in 2 half-moves
20 Rg3 loss in 2 half-moves
21 Rh3 loss in 2 half-moves