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1
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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 Rc8 win in 3 half-moves
2 K4b4 win in 7 half-moves
3 Rd8 win in 7 half-moves
4 K5b5 win in 27 half-moves
5 Kb6 win in 27 half-moves
6 Ra6 win in 35 half-moves
7 K4b5 win in 37 half-moves
8 Ra7 win in 37 half-moves
9 Rg8 win in 39 half-moves
10 Rh8 win in 39 half-moves
11 Ka6 win in 41 half-moves
12 Re8 win in 41 half-moves
13 Rf8 win in 41 half-moves
14 K5b4 loss in 4 half-moves
15 Ka3 loss in 2 half-moves
16 Kb3 loss in 2 half-moves
17 Rb8 loss in 2 half-moves