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

Book: ∞ / 0

# move proof disproof
1 c5 0
2 Rg8 0
3 f5 0
4 Nf6 0
5 Ng5 0
6 Ba6 0
7 a5 0
8 f6 0
9 Bb7 0
10 Ke6 0
11 a6 0
12 Bg7 0
13 Bh6 0
14 e5 0
15 Kd6 0
16 Kc7 0
17 Kd8 0
18 Ke8 0
19 Na6 0
20 e6 0