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

EGTB: win in 4 half-moves

# move score
1 Rb6 win in 3 half-moves
2 Rb7 win in 3 half-moves
3 K4b5 draw
4 K6b5 draw
5 Rb4 draw
6 Rb5 draw
7 Rb8 draw
8 Rd1 draw
9 Re1 draw
10 Rf1 draw
11 Rg1 draw
12 Ka3 loss in 2 half-moves
13 Ka7 loss in 2 half-moves
14 Kb3 loss in 2 half-moves
15 Kb4 loss in 2 half-moves
16 Kb6 loss in 2 half-moves
17 Kb7 loss in 2 half-moves
18 Ra1 loss in 2 half-moves
19 Rb2 loss in 2 half-moves
20 Rb3 loss in 2 half-moves
21 Rc1 loss in 2 half-moves
22 Rh1 loss in 2 half-moves
23 K4a5 loss in 1 half-moves
24 K6a5 loss in 1 half-moves