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

Book: ∞ / 0

# move proof disproof
1 a6 0
2 Rd8 0
3 Bh6 0
4 a5 0
5 Rb8 0
6 Bc8 0
7 g4 0
8 Ba6 0
9 Nf6 0
10 e5 0
11 Nh6 0
12 c5 0
13 Rc8 0
14 e6 0
15 Re8 0
16 h5 0
17 Bg7 0
18 h6 0