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

Book: ∞ / 0

# move proof disproof
1 b3 0
2 f5 0
3 Kc6 0
4 Kd6 0
5 Nf6 0
6 Re8 0
7 Nc6 0
8 Ke8 0
9 Kd8 0
10 Ke7 0
11 Kc7 0
12 a6 0
13 Ba6 0
14 Ke6 0
15 Rd8 0
16 Bb7 0
17 Na6 0
18 Bg7 0
19 Nf8 0
20 f6 0
21 a5 0
22 Bf8 0
23 g4 0
24 Rg8 0
25 Rf8 0