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

Book: ∞ / 0

# move proof disproof
1 Ke6 0
2 Ra2 0
3 Ra3 0
4 Na6 0
5 Kc6 0
6 Ke7 0
7 Kd8 0
8 Ke8 0
9 Kd6 0
10 Ra1 0
11 Rb7 0
12 c6 0
13 c5 0
14 Nc6 0
15 Ra8 0
16 Ra6 0
17 Ba6 0
18 Ra5 0
19 Bb7 0
20 Ra4 0