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

Book: 33 / 158

# move proof disproof
1 f5 1 33
2 Ng8 21 62
3 Nf7 25 63
4 Ke6 1 63
5 Ng4 44 64
6 g5 3 64
7 Rg8 3 64
8 Ke8 1 64
9 Kc6 1 64
10 Nf5 1 64
11 Na6 1 64
12 Bb7 1 64
13 c5 1 64
14 e5 1 65
15 e6 1 65
16 a5 1 65
17 Nc6 1 65
18 Ba6 1 65
19 Kd6 1 66
20 Qe8 1 86
21 g6 1 86
22 c6 24 94
23 a6 22 221