Repertoire Problems: Grunfeld Defence vs King's Indian

Can someone help me with in choosing which one of this openings suits better my playing style? I am an aggresive player, who doesn't like to play cramped positions.I am very good at tactics and I like dynamic positions.

Also I don't mind if you can suggest other openings.Also I need help against e4. I think the Sicilian Najdorf is the best choice for me, but I also like to hear other suggestions.

Here's my repertoire for White:

• Exchange Variation with f3 agaist Queen's Gambit Declined
• e4 Variation against Queen's Gambit Accepted
• Main line against Slav, Semi-Slav
• e3 Nimzo-Indian
• Saemich King's Indian
• Russian System against the Grunfeld
• 2.Bg5 against Dutch

I hope you can help me. Thanks in advance!

you cant always play the gruenfeld so its either both or non i would guess. but thats just my limited knowledge i might be incorrect.

but i thought you cant always play the gruenfeld, you definetly need to transpose dont you?? i mean you cant force white to play it or am i incorrect?

KID FTW!!!!

(for the win)

That description fits better with the Grunfeld, i guess.

Thank you for your suggestions.

 I will start studying the Grunfeld.Also if i remember correctly, almost every chess top player uses the Grunfeld, at least occasionaly.

Again?  This question arises every two or three weeks, maybe even more often than that. 

Why is this question so much more popular than, say, Slav or Lasker Variation?

Or Russian or Spanish?

Btw, your white repertoire is almost exactly what Schandorff recommends. That's quite a bit of memorization.

The basic problem with the Grunfeld is that White has about 8 different ways to play to gain a slight edge, and they all have distinctly different flavors. It would take a tremendous amount of effort to stay current on the key variations of the Grunfeld.

The King's Indian has basically three flavor: the Mar del Plata and similar openings, the Fianchetto lines made a bit more popular by Boris Avrukh, and the Saemisch. Since you're already familiar with the Saemisch, the decision to play the KID should be easy.

Actually, I am now studying Schandorff's repertoire and I also studied Avrukh's repertoire, and I am also familiar with the fianchetto variations, and I also studied a bit of the Grunfeld repertoire which avrukh recommends, and some lines in Attacking Chess: The King's Indian Defence.

So, now I think the KID is very hard to play,especialy against the Fianchetto and Saemich lines.

pellik, you mean 3.f3 grunfeld

which i studied

The problems with the KID are Mar del Plata Variation, Saemish Variation and Fianchetto Variation, where Black has to memorize many variations and White few variations.Also these variations give White a slight plus, but Black has some attacking chances, if not he has to seek counterplay, if doesn't want to lose the game.

Against the Grunfeld, there aren't so bad problems.You almost always have counterplay against the White center. The most challenging variations are Russian System and Exchange Variation.But Black hasn't so bad results in these variations.

pellik, the problem with the Panno Variation against Saemish is the modern variation

Also, I played the Panno Variations against the Saemich and Fianchetto Variations and couldn't make easily counterplay.

pfren I have a FIDE rating of 1950 and I can beat easily 2100-2200 rated opponents, like i did in the national championship,when i played in 11 games 10 opponents rated over 2000 and scored 6.5/11. Also, I am a 15 years old so I must memorize many variations to be first in the national juniors championship.

With that in mind, Propp, have you considered the Bogo-Indian and Nimzo-Indian as Black? 

Another option would be to play the Chebanenko Slav the way Kamsky does,  often with g6, getting into some Schlechter-Slav types of positions with interesting counterplay.

Most juniors will be ready for the KID and Grunfeld. They may not be as comfortable in more subtle and complex systems.

Smyslov Fan, I have played the Nimzo-Indian and Queen's Indian complex but it was too solid for my tastes, i played the queen's gambit declined and slav and again was too solid for my tastes, i played the benoni and for me it was playable, but i still prefered the KID and Grunfeld,but couldn't decide what suits my style better.

pellik, that's a Saemish Benoni which doesn't appeal to me pretty much, i play this line as white so i am prepared in this variation and i know how to obtain an adavantage.

pellik, you are right

Wait you are complaining about being too solid? Are you trying to lose more games bro.