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

Book: 41 / 501

# move proof disproof
1 e4 1 41
2 g4 1 41
3 Ng3 1 41
4 Nd4 1 41
5 Qc2 1 41
6 Qa4 31 42
7 Nf4 2 42
8 d3 30 43
9 Nbc3 30 43
10 Kf1 28 43
11 f3 27 43
12 h3 27 43
13 a4 27 43
14 Na3 27 43
15 c5 26 43
16 a3 26 43
17 b3 26 43
18 f4 26 43
19 Rf1 26 43
20 Rg1 26 43
21 g3 25 43
22 Qb3 1 43
23 b4 1 43
24 d4 1 43
25 h4 24 48
26 Nec3 31 59
27 Ng1 28 59