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

Book: 241 / 1179

# move proof disproof
1 Nf6 44 241
2 a6 27 241
3 a5 25 241
4 f6 22 241
5 Nh6 538 242
6 g6 105 242
7 b6 61 242
8 Nc6 46 242
9 b5 26 242
10 d5 3 242
11 Na6 44 243
12 d6 26 246
13 f5 20 247
14 e6 8 248
15 h6 83 250
16 c5 47 251
17 c6 47 254
18 h5 1 263
19 g5 5 284
20 e5 1 318