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

Book: 23 / 311

# move proof disproof
1 Nf4 63 23
2 g4 3 23
3 Qf3 2 23
4 Qh5 2 23
5 e4 185 24
6 Qg4 37 24
7 Qe2 1 24
8 a3 1 42
9 b3 1 42
10 c3 1 42
11 d3 1 42
12 f3 1 42
13 g3 1 42
14 a4 1 42
15 c4 1 42
16 Na3 1 42
17 Nc3 1 42
18 Rf1 1 42
19 Rh1 1 42
20 Kf1 1 42
21 Ke2 1 42
22 Ng5 1 44
23 b4 1 45
24 d4 1 45
25 f4 1 50