I told Andrew Martin that personally a few years back when he was up in Edinburgh.
It is not going to turn you into KID expert but it lays down good foundations.
Back on topic. Of course Estrin's book on the Two Knights though out of date
theoretically does show all the snares and tactics this opening hides.
8.Qf3 (The Bogoljubov Variation) would be a good weapon to have up one's sleeve.
Of course when I first saw this I was up for saccing the a8 Rook with 8...cxb5.
Knowing all the wrinkles in that line would be a must.
It is what Euwe opted for when he faced this line v Bogoljubov. (and Euwe lost).
Estrin as usual comes up with a load of tricky looking lines some ending
with his classic :"..and Black/White has a strong attack for scrificed material"
(or words to that effect. no analysis just a hint to look here.)
This means you dig in and do some work for yourself and judge how
difficult it would be if this was virgin territory for your opponent.
A loss in 100% pure analysis but a position so tricky your opponent is bound to go wrong.
Hope Chess! Not a dirty word in my vocab, and I have the games to prove it.
Good players beat weaker players without all the tactics by simply
heading for level positions and watching them slowly shipwreck themselves.
100% analysis proves the position is equal but so equal the weaker
player is bound to go wrong....Hope Chess?
Back to the opening..
Of course here Black can put White on a new sidewalk with...
6...Bd7 Instead of 6...c6 which opens up it's own can of worms when Black has
lines when he just sacs that out of play Knight on a5.
Of course White can take the game in a completely different direction
one move earlier with:
Morphy's 6.d3 instead on 6.Bb5+ when White can consider the Bronstein piece sacrifice.
A liefetime is to short to stuff your brain with all the lines.
Just play Chess and hope
for the best.