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

Book: 21 / 513

# move proof disproof
1 Rg1 2 21
2 Rf1 2 21
3 Rb1 2 21
4 Nf4 2 21
5 Na4 2 21
6 Ne2 2 21
7 Nb1 2 21
8 g4 2 21
9 b4 2 21
10 a4 2 21
11 d3 2 21
12 b3 2 21
13 a3 2 21
14 f4 1 21
15 f3 1 21
16 Qf3 208 22
17 Ng5 109 22
18 Ke2 65 22
19 Nd5 11 22
20 Qg4 8 22
21 Nb5 8 22
22 Qh5 6 22
23 Ne4 4 22
24 g3 2 22
25 d4 2 22
26 Ng1 29 23
27 Kf1 29 23
28 Qe2 3 23
29 e4 1 26