I found this position in the Chess Programming Wiki. It's a perft calculation. In the depth 2 the results informs that there are 3 checks. But I just able to find 2 checks:
- Kf1 hxg2+
- Kf1 Bxe2+
[FEN "r3k2r/p1ppqpb1/bn2pnp1/3PN3/1p2P3/2N2Q1p/PPPBBPPP/R3K2R w KQkq - 0 1"]
Where is the third check?
May look stupid, but I really can't find it.