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

Book: 151 / 2405

# move proof disproof
1 a3 79 151
2 g3 72 151
3 Kf1 69 151
4 g4 68 151
5 Na3 51 151
6 h3 30 151
7 c3 21 151
8 b3 20 151
9 e4 20 151
10 c4 19 151
11 Qe2 18 151
12 Nc3 15 151
13 d3 14 151
14 Ke2 14 151
15 Nh3 12 151
16 a4 10 151
17 Nf3 8 151
18 Qh5 529 152
19 d4 58 152
20 f3 6 156
21 f4 4 156
22 b4 8 157
23 h4 8 157
24 Ne2 5 158
25 Qg4 789 445
26 Qf3 458 599