How many openings can you name?

How many openings can you name?  A lot? Well then, how many openings along with their IDEAS can you list?  For example: Alekhine's Defense: An idea to get white to overextend his center pawns.  Danish Gambit: An idea of rapid piece development for an early attack.  Kings Indian Defense: An idea of generating counter play on the queen side(?).  This topic is, truthfully, so I can get some ideas of my own and learn something new about chess.  Have fun!    P.S.  Can anyone tell me what the Halloween Gambit is and its idea?

Yes, the Halloween Gambit is a variation of the Four Knights Game. White's idea is to sacrifice the knight to get a huge center pawn mass. Ideally, he wants to establish a strong pawn on d6 and box in the black king. This is the "stem" game:

http://www.chessgames.com/perl/chessgame?gid=1258288

Here is a possible opening stage of the Halloween Gambit:

I think I could name so many I would get bored. And ideas... that's quite subjective, is rapid development an idea? or would you have to be much more in depth.

Scotch gambit, dark square control in the Nf6 lines, weakness of the f7 pawn, rapid development, attacking the uncastled king Would that be too many ideas?

I know the Petroff Defense. The idea: to draw.

My white is reti

my black response to e5 is counter center defense 

my black response to d5 is queen's indian defense

Thank you for the comments!  And a special thanks to birdsopening for explaining the "Halloween Gambit."

I know everyone has their own level of understanding with specific openings, so thank you cofail for your specific knowledge, interesting ideas!

King's Gambit: 1.e4 e5 2.f4

• A better center control, being able to push your d4 pawn after the dude on e5 is removed.
• A wild and open game, so don't go in here if you prefer positional games .
• A rapid development of your forces.
• Your best plan is to strike as fast and strong as you can on f7.
• When you 0-0, you get the semiopen f file for your rook, helping to attack f7.

Blackmar-Diemer Gambit, Ryder Gambit (1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Qxf3)

• After 4...Qxd4 5.Bd3, you're ready to 0-0-0 and use the fully open d-file to attack.
• You have to be very agressive, more than in the King's Gambit.
• You don't have to give your opponent time to castle. his king in the center is very weak.
• It's perfect to escape from the Scandinavian Defense, which I hate (1.e4 d5 2.d4).
• You can attempt the Halosar Trap

RuyLopezItalianGameScotchGameFourKnightsViennaKing'sGambitCenterGameAlapin

PonzianiTwoKnightsHungarianLatvianPhilidorQGAQGDKIDQueensIndianNimzoindian

BogoindianDutchGrunfeldCatalanCaroKannSicilianFrenchScandinavianPircRetiEnglish

StonewallColleRobatschNimzowitschLarsenSaragossaDurkinAlekhine and no doubt a lot were left out.

The Halosar trap is fun! I've only pulled it off in blitz games though.

square22,

For the record, in the King's Indian Defense, in the Classical Main Line variation, Black looks for counterplay on the kingside, not the queenside.

The Classical Variation is 3.Nc3 Bg7 4.e4 d6 5.Nf3 0-0 6.Be2 e5

	a	b	c	d	e	f	g	h
8									8
7									7
6									6
5									5
4									4
3									3
2									2
1									1
	a	b	c	d	e	f	g	h

The Classical Variation

• The Main Line or Mar del Plata Variation continues 7.0-0 Nc6 8.d5 Ne7. Now White has a wide variety of moves, including 9.b4, 9.Ne1, and 9.Nd2, among others. Typically, White will try to attack on the queenside by preparing the pawn break c4-c5, while Black will attack on the kingside by transferring his knight from f6 to d7 (usually better placed than at e8, as it helps slow White's queenside play with c4-c5), and starting a kingside pawn storm with ...f7-f5-f4 and ...g6-g5. 9.b4, introduced by Korchnoi in the 1970s, used to put top players off playing this line, but it has recently been revived by Radjabov.

Thank you MrEdCollins for the feed back on the King's Indian.  I feel, although I have played it quite often, that I have not realized all of the capabilities of this opening.  As a beginner to opening specific's and subtleties, my first thought is, "Push my castled King's pawns?!  Well that would be stupid!"  So this lets me understand that when you see an attack, build up the pressure and the forces and go for it, no matter what side of the board!  One must need coaching perhaps to know  when or even how to be able to see, coordinate, and execute a plan of attack. Either that or you are just very smart with this game!  Bobby Fischer's King side attacks using the KIA has always impressed me.  

I pulled it off at chess.com's Blackmar-Diemer Gambit's tournament.

Once I played the Ryder Gambit but my opponent just missed that he could have taken my d-pawn, so it failed :P

can someone perhaps illustrate this "Halosar trap"?  Was this recorded in a classic game?

After 10. Qxa6  Qxe3ch  11. Kb1  Bxd1   now what?  12 Qc6 ch maybe?