Opening trap question

What is the best trap in chess that allows you playable position if opponent doesnt fall for it?

Well at least for me the answer is pretty obvious, I have pulled this one countless times online. Have you heard of the Lasker trap in the Albin countergambit? It is practically the only example of a real underpromotion in the opening (at least one that has a legit chance of occurring), and is so easy for white to miss if they have never seen this before. I would post my own game, but there are too many of my games to choose from (at least 50) and this PGN from https://www.chess.com/article/view/the-10-best-chess-traps#lasker-trap does a better job at explaining. If your opponent doesn't fall for it, then you have a normal Albin countergambit which is tricky in its own right. Update: I actually have pulled this in an OTB tournament game.

Blackburne shilling gambit

Budapest gambit

Some kind of delayed c3 Sicilian where Black goes Nf6 and White doesn't defend the e4 pawn (because if takes then Qa4+ picks up the Knight.) So Black goes Nc6, seemingly stopping the check, and then White plays d4. At this point it looks like the tactic is blocked in two different ways and people can actually fall for this, but if Nxe4 then the pawn moved out of the way to d5 at the same time forcing the other Knight to move out of the way, and Black, again, loses a piece. So instead Black exchanges in the center, and White go down a pawn here, but this is a main line. As far as I know it's a reputable gambit for White but likely there's a lot to learn about the mainline before trying to play the trap too much.

what? You don't want a playable position you want a superior position and playing for traps is bad. the Albin, Budapest and Shiling gambits all fail to equalize

The only "Trap" that I see worth knowing will literally happen maybe once in a lifetime (I've had it happen twice in over 3000 games, roughly half of them as Black)

You can join me in playing the Sicilian Delayed Alapin, which has THREE consecutive traps in it. The problem is: If opponent doesn't fall for the traps you will have to play a triple gambit, which is equal by stockfish analysis and with great attacking chances still for white but VERY HARD to play and can cost you the match.

It goes like this:

1. e4 c5 2. Nf3 d6 3. c3 Nf6 4. Be2 Nxe4 5. Qa4+ (fallen for trap)

1. e4 c5 2. Nf3 d6 3. c3 Nf6 4. Be2 Nc6 5. d4 Nxe4 6. d5 Nb8 7. Qa4+ (fallen for trap 2)

1. e4 c5 2. Nf3 d6 3. c3 Nf6 4. Be2 Nc6 5. d4 cxd4 6. cxd4 Nxe4 7. d5 Qa5+ 8. Nc3 Nxc3 9. bxc3 Qxc3+ 10. Bd2 (fallen for trap 3)

1. e4 c5 2. Nf3 d6 3. c3 Nf6 4. Be2 Nc6 5. d4 cxd4 6. cxd4 Nxe4 7. d5 Qa5+ 8. Nc3 Nxc3 9. bxc3 Ne5 10. Nxe5 Qxc3+ 11. Bd2 Qxe5 12. O-O Qxd5 13. Rc1 Bd7 (correct play by black, triple gambit, material: -3, stockfish evaluation: +1.2)

I tried it OTB and my opponent was too scared of the line, so he decided not to take my e-pawn, which resulted in a very symmetrical game that benefits white slighty:

1. e4 c5 2. Nf3 d6 3. c3 Nf6 4. Be2 Nc6 5. d4 cxd4 6. cxd4 e6 7. Nc3

This might happen to you aswell, as some sicilian players hide behind their beloved theory. So don't be scared of the triple gambit line as you won't even face it that often - and if you do at high level play, learn the position well and you might create a fantastic tactical winning game. There are a lot of mating net traps later on aswell.

1. d4 d5 2. c4 e5 3. Nc3 Nf6 4. Bg5 Nbd7 and now White can blunder with 5. cxd5 exd5 6. Nxd5 Nxd5! 7. Bxd8 Bb4 and you win a piece but this trap never happens and you would probably hate the Orthodox Defense. Also 3... Nf6 is probably inaccurate because it allows the Ne2 exchange which is really annoying

May I correct you, I think you mistyped it. It is e6 on move 2 from black, part of the Queen's Gambit Declined, also known as the Elephant trap and not part of the Albin Countergambit.

I don't know traps, I know good gambits:

Evans', Budapest, Benko.

It depends at what level you're playing - at really high ones, there's no point at playing for traps - as GM Finegold say - "Tricks [Trix] are [is] for kids", I play a trap called "always my comort zone, never your comfort zone" - as White I play 1.c4 - Botvinnik Setup if possible, NOT transposing into d4 openings. As Black I play French Defense, because opponent needs to know too much variations to face it properly - you always get Advanced, Exchange, Tarrasch, unless you play with  a master. against d4, I guess d5 and choose my own unique variation to it - which I haven't done yet.

In the Evans', he must take the pawn, must return it, must put his queen on an akward square, if Black is totally ready for it, yes, your pawn-structure is ruined, and also, you can just divert from main line during the game...

I've heard that computer programs take the pawn, don't return it, and lose... [same program - Stockfish vs. itself, never tried it though]