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

EGTB: win in 4 half-moves

# move score
1 Rb8 win in 3 half-moves
2 Kb6 draw
3 Kc6 draw
4 Kd6 draw
5 Ra8 draw
6 Rc8 draw
7 Rd8 draw
8 Re8 draw
9 Rf8 draw
10 Rh6 draw
11 Kb4 loss in 2 half-moves
12 Kb5 loss in 2 half-moves
13 Kc4 loss in 2 half-moves
14 Kd4 loss in 2 half-moves
15 Kd5 loss in 2 half-moves
16 Kg4 loss in 2 half-moves
17 Kg5 loss in 2 half-moves
18 Kh4 loss in 2 half-moves
19 Rg8 loss in 2 half-moves
20 Rh7 loss in 2 half-moves
21 Kg6 loss in 1 half-moves
22 Kh6 loss in 1 half-moves