Pawn to C4 to bind center?

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PlatypusofDoom
My attempt at the KIA versus the French Defense resulted in Black's pawns on e5 and d4 with White's on e4, d3, and c3. If the KIA prefers a closed and immobile center, what are the pros and cons of advancing to c4 to accomplish this?
Here is the opening for context:
In the real game I chose Nb3 harrassing Black's Bishop, not c4, to delay black pushing f5; however, I imagine other lines may lead to considering a c4 and e4 bind. If c4 is chosen, is it deviating from the KIA too much to apply it's principles? In other words, is structuring white's pawns on e4, d3, and c4 wandering into another opening?



axel340

in general in the KIA, you want a solid center so that you can attack on the king side. So making sure with c4 that the centre is locked up opens up opportunities to attack on the kins side. I would not be afraid of f5 by black. You generally need to take the pawn on f5, in order to prevent it of advancing to f4. After f5 by black, I usually try to open the position as much as possible with white so that I can take advantage of the fact that the f7 pawn is no longer protecting the black king. I usually try to place my queen and/or bishop on the a2-g8 diagonal