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

Book: 26 / 785

# move proof disproof
1 c4 29 26
2 b4 1 26
3 a4 1 26
4 e4 1 26
5 g3 1 26
6 f3 1 26
7 c3 1 26
8 b3 1 26
9 a3 1 26
10 Nf4 1 26
11 Ke1 1 26
12 Ng5 433 27
13 g4 50 27
14 Na3 27 27
15 Qe1 26 27
16 Rg1 25 27
17 Qf1 25 27
18 Rf1 24 27
19 Qg1 24 27
20 Re1 23 27
21 f4 1 27
22 d3 30 30
23 Nc3 30 30
24 Kf1 1 49
25 Kd3 1 49
26 Kf3 1 49
27 Ng1 24 50
28 d4 1 50