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

Book: ∞ / 0

# move proof disproof
1 a6 0
2 a5 0
3 Rf8 0
4 Re8 0
5 Rd8 0
6 Ke6 0
7 e5 0
8 Nc6 0
9 c6 0
10 e6 0
11 Ba6 0
12 Rg8 0
13 Kc6 0
14 Kd6 0
15 Kd8 0
16 Ke8 0
17 h5 0
18 c5 0
19 Bb7 0
20 Na6 0
21 h6 0