The Three Knight’s Variation allows black to get his knight to be exchanged for the light squared bishop which is powerful and eyeing the f7 square. Also the idea might be to open the center with d5 after the minor piece exchange.
1.e4 e5 2.Nc3 Nc6 3.Bc4 Nf6 4.d3 Na5 5.Qf3 Nxc4 6.dxc4 Bb4 7.Nge2 d6 8.h3 Be6 9.b3 Nd7 10.0-0 Bxc3 11.Nxc3 0-0 12.Qg3 f5 13.Bg5 Qe8 14.exf5 Rxf5 15.Nb5 Qc8 16.Rae1 Nf8 17.f4 a6 18.Nc3 exf4 19.Rxf4 Rxf4 20.Bxf4 Ng6 21.Be3 Qd7 22.Bd4 Re8 23.Rf1 Rf8 24.Re1 b5
A mistake which allows white to gain a free pawn.
25.cxb5 axb5 26.a4
White doesn’t capture the free pawn available and overlooks it.
bxa4 27.bxa4 Bc4 28.Kh2 Qf5 29.Re7 Rf7 30.Re8+ Rf8 31.Re7 Rf7 32.Re8+ Rf8 33.Re7
A three fold repetition and draw.
In the Oxford variation,Bishop variation,Breyer Variation,Three Knight's Variation, Boden-Kieseritzky Gambit,Alekhine Variationand Reversed Spanish Opening,unlike some of the previous openings these can be played even in longer formats of the game as they are less riskier and positional to be played and hence played more by the high level of chess players.