[Event "Live Chess"]
[Site "Chess.com"]
[Date "2019.07.17"]
[Round "?"]
[White "jeet-kune-do"]
[Black "Poradnik"]
[Result "1/2-1/2"]
[WhiteElo "1858"]
[BlackElo "1906"]
[PlyCount "74"]
[EventDate "2019.??.??"]
[TimeControl "600"]
[WhiteClock "0:05:53"]
[BlackClock "0:03:56"]
1. g3 {0} e6 {1} 2. Bg2 {3} d5 {1} 3. d3 {4} Nf6 {2} 4. Nd2 {3} Bb4 {5} 5. a3 {
3} Ba5 {2} 6. h3 {13} c5 {14} 7. e3 {3} Nc6 {4} 8. Ne2 {3} Bd7 {22} 9. b3 {3}
Bc7 {8} 10. Bb2 {4} O-O {25} 11. O-O {3} Be8 {15} 12. c4 {33} b6 {22} 13. e4 {
13} dxe4 {11} 14. Nxe4 {5} Nxe4 {5} 15. dxe4 {3} Be5 {12} 16. Qc2 {7} Nd4 {6}
17. Nxd4 {3} cxd4 {7} 18. f4 {6} d3 {10} 19. Qd2 {13} Bxb2 {3} 20. Qxb2 {1} Qe7
{28} 21. Rad1 {9} Rd8 {2} 22. Kh2 {3} Bc6 {25} 23. Rd2 {9} f5 {18} 24. e5 {11}
Bxg2 {19} 25. Kxg2 {3} Qc5 {12} 26. Rf3 {16} Qc6 {35} 27. Qc3 {4} Qc5 {6} 28.
b4 {4} Qc6 {6} 29. Rdxd3 {2} Rd7 {11} 30. Rxd7 {5} Qxd7 {1} 31. Rd3 {2} Qc6+ {2
} 32. Kg1 {6} Qe4 {13} 33. Qd4 {10} Qe1+ {9} 34. Kg2 {3} Qe2+ {2} 35. Kg1 {8}
Qe1+ {2} 36. Kh2 {27} Qe2+ {2} 37. Kg1 {2} Qe1+ {Game drawn by repetition}
1/2-1/2


My qualifications are that I am the creator and manager of a club dedicated to the study and play of the Hippo Defense. Thus far we have played more than 100 instructive Hippo vote chess games.
Yes, that was played in the World Blitz Championship 2007. I did a Stockfish 4 analysis at depth 20 and it seems White was down by around -1.50/-2.00 for much of the game from making several small inaccuracies until 23.Bc4 which Stockfish gave "??".
True, Blitz games don't carry the weight of games played by the standard time control. But here are two players rated 2700+ and the Hippo made a good showing. I don't think you can count it out as yet. Time will tell.
And of course openings don't win games anyway; they just get you to the middlegame.