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

EGTB: win in 4 half-moves

# move score
1 Ka3 win in 3 half-moves
2 Kb3 win in 3 half-moves
3 Ra4 win in 5 half-moves
4 Rb4 win in 5 half-moves
5 K1b1 draw
6 K1b2 draw
7 K2b1 draw
8 K2b2 draw
9 Rc1 draw
10 Rc2 draw
11 Rc3 draw
12 Rc5 draw
13 Rg4 draw
14 Rh4 draw
15 Rc6 loss in 2 half-moves
16 Rc7 loss in 2 half-moves
17 Rc8 loss in 2 half-moves
18 Rd4 loss in 2 half-moves
19 Re4 loss in 2 half-moves
20 Rf4 loss in 2 half-moves