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

Book: 85 / 167

# move proof disproof
1 Rg8 17 85
2 Nf5 3 85
3 Kc6 3 85
4 Ke8 3 85
5 Na6 2 85
6 Nc6 1 85
7 Qe8 21 86
8 Ke6 17 86
9 Ng4 13 86
10 a5 2 86
11 e5 1 86
12 e6 1 86
13 c6 20 88
14 a6 17 88
15 Ng8 1 88
16 Nf7 1 89
17 g6 1 89
18 c5 21 90
19 Bb7 2 90
20 Kd6 1 90
21 Ba6 1 100
22 g4 18 121