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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 Rb2 win in 3 half-moves
2 R2h3 draw
3 R4h3 draw
4 Rb4 draw
5 Rf2 draw
6 Rf4 draw
7 Rg2 draw
8 Rg4 draw
9 Rh1 draw
10 Rh5 draw
11 Ra2 loss in 2 half-moves
12 Ra4 loss in 2 half-moves
13 Rc2 loss in 2 half-moves
14 Rc4 loss in 2 half-moves
15 Rd2 loss in 2 half-moves
16 Rd4 loss in 2 half-moves
17 Re2 loss in 2 half-moves
18 Re4 loss in 2 half-moves
19 Rh6 loss in 2 half-moves
20 Rh7 loss in 2 half-moves
21 Rh8 loss in 2 half-moves