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

Book: 2223 / 1219

# move proof disproof
1 Nh6 724 2223
2 Ba6 105 2465
3 e6 390 2538
4 c6 0
5 c5 0
6 Bb7 0
7 g5 0
8 e5 0
9 f6 0
10 f5 0
11 h5 0
12 h6 0
13 Nf6 0
14 g6 0
15 a5 0
16 a6 0
17 Na6 0
18 d5 0
19 Nc6 0
20 d6 0