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

Book: ∞ / 0

# move proof disproof
1 b4 0
2 e6 0
3 Bf8 0
4 Bg7 0
5 Ke6 0
6 e5 0
7 Ra7 0
8 Re8 0
9 Bb7 0
10 Rg8 0
11 Nc6 0
12 Rd8 0
13 Rf8 0
14 Ke8 0
15 Kd8 0
16 Kc7 0
17 Kd6 0
18 Kc6 0