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

Book: 24 / 338

# move proof disproof
1 Rg1 25 24
2 Rf1 1 24
3 Nh4 1 24
4 Nd4 1 24
5 Ng1 1 24
6 Nc3 1 24
7 Na3 1 24
8 h4 1 24
9 d4 1 24
10 b4 1 24
11 a4 1 24
12 e4 1 24
13 h3 1 24
14 g3 1 24
15 d3 1 24
16 b3 1 24
17 a3 1 24
18 Ne5 84 25
19 Ng5 81 25
20 g4 43 25
21 Ke2 31 25
22 Kf1 28 25
23 Qe2 25 25
24 Qa4 2 25
25 c5 1 25
26 Qc2 1 27
27 Qb3 1 27