1.nf6 d4 2. e5
Tennison Gambit
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One line is. 1. Nf3 d5 2. e4 dxe4 3. Ng5 Nf6 4. Bc4 e6 5. Nc3 b6
This thread has been dead for 10 years but I'll answer anyway. The Tennison gambit is pretty much a reversed Scandinavian Defense. However, it seems to be unsound, and weak in the beginning, I guess it could be a long term advantage with easier developed pieces and blacks weak pawn structure, but it could be a quick knockout for you if you play it incorrectly, so it would be recommended to study some lines.
But like I know anything.
4 moves ahead of the game and in the Tennison Gambit white can take black's queen for free this is a gambit to play for 600- players as they will not see the knight and bishop sacrifice as the best moves they will think they are blunders but actually it's them that's losing after the Queen capture
Aug 6, 2020
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#47
One should play the Tennison, even if it is bad, because it's not as bad as it looks.
Aug 6, 2020
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#48
Sure, but the opponent is not likely to find the best line. Even at long time controls. If you were to play it consistently, then there will be trouble. As a surprise opening, it serves its purpose.
Aug 6, 2020
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#49
Lol, it's very easy to keep the pawn since white can't play a bishop check like he can in the Budapest.
And pretty much about 50% of the people I play either respond to my Budapest with the Bf4 line, so I don't see how it's so hard to spot Bf5.
If you're a 1500-ish player like me, the Tennison definitely works. I especially love it because I discovered it by accident when I was around 900-ish (three months ago??), when I didn't know how to respond to the Scandinavian at all, just playing my normal 1. e4 ... 2. Nf3 muscle memory two moves in a blitz game, when I magically found my opponents to fall for tricks that I didn't even knew existed. Right now, I still win probably 80% of the games I use the Tennison Gambit in! Of course, I just broke through 1500 yesterday and am now hovering around 1500, while you guys are all 1900+ (pfren you're an IM!). 
Edit: one other thing to add, I do play predominantly blitz and bullet games hehe
Aug 6, 2020
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#51
If it's fun, you should play it
but you'll just be a pawn down if they find Bf5.
If you really like the Tennison you might want to puck up the Budapest defense instead
Yeah, it's quite fun! But the Budapest... hmm, interesting, I might consider it but I already have an opening repertoire for the Indian Game haha. I just find the Scandinavian a bit boring :/
Aug 6, 2020
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#53
idk about you but I still play the Budapest and probably will never drop it
SNUDOO wrote:
idk about you but I still play the Budapest and probably will never drop it
danggg! i'll try
Aug 6, 2020
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#55
hihihellochess wrote:
SNUDOO wrote:
idk about you but I still play the Budapest and probably will never drop it
danggg! i'll try
you'll have to learn some lines though.
Alekhine attack is pretty ferocious but it's not commonly seen (I've faced it once out of all my games or so)
so that only leaves the Rubenstein (where white keeps the pawn), the Positional variation (white tries to get the two bishops for free and grind all day), and the Alder variation (where white can play an f4 push and try to go all ham on black's kingside).
My favorite variation to play against is the Alder.
Aug 7, 2020
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#57
its very unsound and as bad as it looks.
most Scandinavian players should know by heart how to get significant advantage out of this opening..
maybe less if you try to force d5 out of Reti but why should you..
i play it all the time in blitz and bullet tho cause its super fun and full of tricks.
Oct 19, 2020
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#59
3. cxd5 Nxd5 4. e4 Nf6 5. Nc3 with a big advantage for white
This allows 5...e5 which is just slightly better for white. Playing 4.Nf3 first is considered to be more accurate.
Yeah, actually it's fun to trick people like that in blitz. They know the marshall is supposed to be bad, but they play 4.e4 and you get a reasonable position, and they don't understand what they did wrong.
But like the Tennison, this sort of trickery works less and less frequently as your opponents get stronger.
There are legitimately tricky and difficult openings people can play without playing nonsense.
I'll show a game I recently lost in blitz, but first a little background
Ok, so now my game
On the first game Black is winning after 10...Qd5 (7.exf6? is simply bad), and the second one is mainstream theory of the Max Lange attack (and which Black can avoid alltogether by 5...d6! in place of 5...Nf6). Playing the Max Lange without knowing any lines is not a very wise choice.
Unfortunately for me I cobbled together my openings on my own with a database... so there were many nasty surprises for me as black in 1.e4 e5 openings heh.