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

EGTB: win in 4 half-moves

# move score
1 Kb6 win in 3 half-moves
2 Rc3 win in 5 half-moves
3 Ra7 draw
4 K4b4 loss in 2 half-moves
5 K4b5 loss in 2 half-moves
6 K4d4 loss in 2 half-moves
7 K4d5 loss in 2 half-moves
8 K5b4 loss in 2 half-moves
9 K5b5 loss in 2 half-moves
10 K5d4 loss in 2 half-moves
11 K5d5 loss in 2 half-moves
12 Kb3 loss in 2 half-moves
13 Kc3 loss in 2 half-moves
14 Kc6 loss in 2 half-moves
15 Kd3 loss in 2 half-moves
16 Kd6 loss in 2 half-moves
17 Ra1 loss in 2 half-moves
18 Ra2 loss in 2 half-moves
19 Ra4 loss in 2 half-moves
20 Ra5 loss in 2 half-moves
21 Ra6 loss in 2 half-moves
22 Ra8 loss in 2 half-moves
23 Rb3 loss in 2 half-moves
24 Rd3 loss in 2 half-moves
25 Re3 loss in 2 half-moves
26 Rf3 loss in 2 half-moves
27 Rg3 loss in 2 half-moves
28 Rh3 loss in 2 half-moves