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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 2 half-moves

# move score
1 Ra2 win in 1 half-moves
2 Kb5 loss in 12 half-moves
3 Kb6 loss in 12 half-moves
4 Kb7 loss in 12 half-moves
5 Ra4 loss in 12 half-moves
6 Ka5 loss in 8 half-moves
7 Ka7 loss in 8 half-moves
8 Ra3 loss in 8 half-moves
9 Rb1 loss in 6 half-moves
10 Rc1 loss in 4 half-moves
11 Rd1 loss in 4 half-moves
12 Ra5 loss in 2 half-moves
13 Re1 loss in 2 half-moves
14 Rf1 loss in 2 half-moves
15 Rg1 loss in 2 half-moves
16 Rh1 loss in 1 half-moves