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

EGTB: win in 4 half-moves

# move score
1 K6b5 win in 3 half-moves
2 Ka3 win in 3 half-moves
3 Ka7 win in 3 half-moves
4 Kb6 win in 3 half-moves
5 Rb5 win in 3 half-moves
6 K4b5 draw
7 Kb7 draw
8 Rc5 draw
9 Rg5 draw
10 Rh5 draw
11 Kb3 loss in 2 half-moves
12 Kb4 loss in 2 half-moves
13 Rd5 loss in 2 half-moves
14 Re5 loss in 2 half-moves
15 Rf5 loss in 2 half-moves