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

Book: 16 / 837

# move proof disproof
1 g3 236 16
2 Qg4 98 16
3 g4 70 16
4 Nd5 44 16
5 Ng5 273 17
6 Nb5 12 18
7 Qh5 14 19
8 Qf3 24 20
9 Ne4 8 21
10 e4 3 21
11 Rg1 3 21
12 d3 2 21
13 d4 2 21
14 Nf4 3 27
15 Ng1 3 27
16 Nb1 4 40
17 a3 3 40
18 b3 3 40
19 f3 3 40
20 a4 3 40
21 b4 3 40
22 f4 3 40
23 Ne2 3 40
24 Na4 3 40
25 Rb1 3 40
26 Rf1 3 40
27 Qe2 3 40
28 Ke2 3 40
29 Kf1 2 40