The Classical Variation is regarded as the probably strongest weapon for White against the King’s Indian Defense. Black’s most frequent response is the Mar del Variation 7…Nc6 8.d5 Ne7, which gives White many options. Over the last 30 years the traditional mainline 9.Ne1 has been outperfomed by the Bayonet Attack 9.b4!, causing many King’s Indian players to look for alternative openings.
1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 0–0 6.Be2 e5 7.0–0 Nc6 8.d5 Ne7 9.b4!
If you also like the idea to punish the King’s Indian players for their disrespect for space, buying my chessable course, with or without videos, would be the way to go. Maybe you want to check some of the reviews first.
More information is available here, in blog post 83, which features a very instructive game between two world class players.
Alternatively, you can read part 1 and part 2 of the introduction published some time ago in my blog.
In part 2 of the overall repertoire against the KID I deal with all of the ways for Black to avoid the Bayonet Attack, by deviating on move 6 or 7.