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

EGTB: win in 1 half-moves

# move score
1 Rxb7 win in 45 half-moves
2 Kaxb7 loss in 2 half-moves
3 Kcxb7 loss in 2 half-moves
4 Rxg3 loss in 2 half-moves