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

Book: ∞ / 0

# move proof disproof
1 a6 0
2 Rg8 0
3 Ba6 0
4 h5 0
5 Rf8 0
6 d6 0
7 d5 0
8 Rd8 0
9 Rb8 0
10 Bb7 0
11 Re8 0
12 e4 0