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

Book: 206 / 2338

# move proof disproof
1 c4 161 206
2 Qh5 99 206
3 Qf3 25 206
4 Nh3 11 206
5 g4 110 207
6 Nc3 63 207
7 Na3 49 207
8 a4 48 207
9 c3 46 207
10 f3 1 207
11 Ne2 51 210
12 Ke2 51 210
13 g3 45 210
14 d4 21 212
15 h3 26 216
16 Kf1 47 217
17 d3 52 219
18 a3 45 220
19 f4 1 220
20 b4 27 223
21 Qg4 611 522
22 b3 262 767
23 e4 249 943
24 Qe2 155 1948
25 Nf3 82 2528
26 h4 0