Breunor: Computer doesn't like 5 .. b5 and black starts falling behind:1) +0.48 (20 ply) 6.Ne2 Nbd7 7.cxb5 exd5 8.exd5 Nb6 9.Nbc3 Bb7 10.Ng3 Be7 11.Bd3 O-O 12.O-O Nfxd5 13.Nxd5 Bxd5 14.Qc2 Bf6 15.Bxh7+ Kh8 16.Bd3 Re8 17.Nf5 Be6 18.Re1
Computer recommends the more traditional King's Indian:
1) +0.08 (20 ply) 5...g6 6.Nc3 Bg7 7.Nge2 exd5 8.cxd5 Nbd7 9.Ng3 h5 10.h4 a6 11.Be2 b5 12.Bg5 c4 13.Qd2 Ne5 14.O-O Bd7 15.Kh2 O-O 16.Kh1 Qb6 17.Be3
Black falls badly behind with 13 B b7
1) +1.90 (23 ply) 14.Ng3 Qxd2+ 15.Rxd2 g6 16.Bd6 Bxd6 17.Rxd6 Ne8 18.Rb6 Bc8 19.bxa6 Nc7 20.Nge4 Nbxa6 21.a3 Ne6 22.Nd5 Nac7 23.Nxc7 Nxc7 24.Bc4 Be6 25.Rc6 Rfb8 26.Rxc5 Bxc4 27.Rxc7 Rc8 28.Rxc8+ Rxc8
Better is Bc4:
1) +1.18 (23 ply) 13...Bc4 14.Qxd8 Bxd8 15.Bd6 Re8 16.Bxc5 axb5 17.Nd4 Bxf1 18.Rhxf1 Na6 19.Bd6 b4 20.Ncb5 Nd5 21.Nc2 Nac7 22.Nxc7 Nxc7 23.Rfe1 Rxe1 24.Rxe1 b3 25.axb3 Ne6
The next move, though, 14 Nbd7 puts it way out of reach:
1) +3.42 (22 ply) 15.Nf5 Re8 16.Bd6 Bxd6 17.Nxd6 Qb6 18.Nxe8 Rxe8 19.Kb1 h6 20.bxa6 Bxa6 21.Bxa6 Qxa6 22.Rhe1 Ra8 23.Re7 Nf8 24.Qd6 Qa5 25.Qc7 Qxc7 26.Rxc7 Ne6 27.Rc6 Kh7 28.Ne4 Nxe4 29.fxe4
Better is g6 to prevent Nf5 (either before or after trading queens):
1) +1.40 (21 ply) 14...g6 15.Bd6 Re8 16.Bxe7 Qxd2+ 17.Rxd2 Rxe7 18.Rd8+ Re8 19.Rxe8+ Nxe8 20.Nge4 Bxe4 21.fxe4 Nd7 22.bxa6 Ne5 23.Be2 c4 24.Rd1 Nc7 25.a7 Rxa7 26.Rd8+ Kg7 27.Rc8 Ne6 28.Bxc4 Nd4 29.a3
2) +1.61 (21 ply) 14...Qxd2+ 15.Rxd2 g6 16.Bd6 Re8 17.Bxe7 Rxe7 18.Rd8+ Re8 19.Rxe8+ Nxe8 20.Nge4 axb5 21.Bxb5 Nc7 22.Bc4 Bxe4 23.Nxe4 Nd7 24.Kb1 Kg7 25.Rc1 Ra5 26.Rd1 Ne5 27.Nd6 Kf6 28.a3