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

Book: ∞ / 0

# move proof disproof
1 h5 0
2 Kc6 0
3 Kc7 0
4 Ke8 0
5 Kd8 0
6 Ke7 0
7 Kd6 0
8 Na6 0
9 Nc6 0
10 e5 0
11 h6 0
12 Bb7 0
13 Ba6 0