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

Book: ∞ / 0

# move proof disproof
1 e6 0
2 Nf8 0
3 c6 0
4 Ng5 0
5 Rf8 0
6 a5 0
7 Rb8 0
8 c5 0
9 g5 0
10 Nf6 0
11 a6 0
12 Rg7 0
13 Ra8 0
14 Re8 0
15 Rc8 0
16 h4 0
17 Rd8 0