[...] 1.¤f3 ¤f6 2.c4 g6 3.¤c3 ¥g7 4.d4 O-O 5.e4 d6 6.¥e2 e5 7.O-O
(7.d5 the Petrosian Variation is currently out of fashion. It could still be an unpleasant surprise for the less-prepared player. The line is not without bite. Way back in 199os Kramnik beat Kasparov twice with 7.d5-CB)7...¤c6
(The sharp line 7...exd4 has been developed by Yurtaev and refined by Glek in recent years. After
8.¤xd4 ¦e8 9.f3 there follows 9...¤c6!? (The Glek move) 10.¥e3 with a complex position-ChessPublishing.com authors
8.d5 ¤e7 9.¤d2
(10.¤xc6 bxc6 offers Black too many open lines.)
White aims for b4-c5 advance supported by N-d2-c4.In this case he would be directly targeting the d6 pawn-CB
(9.¤e1 preparing Nd3 and the advance c5 is the Main Line in this Classical System.)
(However, 9.b4 , the Bayonet Attack, popularised by Kramnik is more in vogue.)9...¤e8
(9...a5 stopping White's expansion with b4 is the sounder option-CB)
(9...c5 the other alternative was a Fischer favourite with which he beat Korchnoi in 1970 Blitz and Larsen in 1971 Candidates' Match.)10.b4 f5 11.c5 ¤f6 12.f3 f4 13.¤c4 g5 14.a4
This is a line developed by Korchnoi. 14...¤g6 15.cxd6!?
This was not considered dangerous. But it avoids complications of main lines.
(The critical move here is 15.¥a3 and there are several games in ChessPublishing.com archives.)15...cxd6 16.¤b5 ¤e8 17.¥d2 h5 18.¥e1
intending Bf2 18...a6 19.¤c3 ¤f6 20.a5
(Not 20.¥f2 g4 21.¤b6? g3!
) 20...g4 21.¤b6 ¦b8 22.¤xc8 £xc8 23.¦c1 £d7 24.¤a4 g3 25.h3
Without the bishop on c8 it would be hard for Black to break through on h3.
(White can win a pawn with 25.hxg3 fxg3 26.¥xg3 h4 27.¤b6 £e7 28.¥h2 ¤h5 But Black has counterplay-CB)25...¤h7 26.¤b6 £e7
"Technically speaking, White should be winning....But in the King's Indian one does not resign such positions as long as there is some chance to get the White King"-Vigorito
27.¦c3 £h4 28.¥d3 ¤g5 29.£e2 ¦f7 30.b5
(30.¥d2 is also possible. But the bishop on e1 restrains Black's g-pawn in the event of ...Nxh3+ gxh3. Besides, it's important to complete the manoeuvre, 30.b5 axb5 31.Bxb5 and Bd7-CB)30...¤f8
(30...axb5 31.¥xb5 ¦d8 to stop Bd7 preventing any scrifice on h3
31.bxa6 bxa6 32.¥xa6 ¤fh7 33.¦c8+ ¦f8
32.¥d2 followed by Rfc1 renders Black's position helpless-CB)
White bishop must not be allowed to come to c8 as Black is planning a breakthrough with...Nxh3-CB
34.¦xb8 ¦xb8 35.£c2
This is not bad.
(But the immediate 35.¥c8! prevents the coming sacrifice on h3-CB)35...¤xh3+
This cannot be sound. But otherwise Black has no counterplay-CB
36.gxh3 £xh3 37.¥c8 £h4 38.¥f5?
Probably a move in time trouble. This only allows Black knight to come up with a tempo.
(As Vigorito points out, 38.a6! wins on the spot. 38...¦xb6 39.a7 and the Black rook cannot come to a6 to stop the pawn from queening.)38...¤g5 39.¥b4 ¥f8 40.£g2 ¦b7!
A resourceful move in a lost position. 41.¦d1
(41.¦c1 fails to 41...¤xf3+ 42.£xf3 £h2+ 43.¢f1 ¦g7 44.£g2 f3°)41...¦c7
(Not 41...¤xf3+ 42.£xf3 £h2+ 43.¢f1 ¦g7 44.¦d2!
) 42.a6 ¦c2!! 43.£xc2?
White misses his way in complications.
(43.¥d2! ¦a2 44.¤c4 ¦xa6 and it is not easy for White to convert his extra material.)43...¤xf3+
An incredible position. White is a rook and bishop up. His a-pawn threatens to queen in two moves. Yet Black is playing for a win-CB
Obvious and wrong.
(44...¤d4! 45.¦xd4 f3° wins easily.)45.¢e2 ¤d4+ 46.¦xd4 f3+!
Should one count material in such a position? Black is bent on promoting to queen for a mating attack-CB
(46...exd4? is too slow. 47.a7ќ)47.¢d3??
A tragic blunder.
(He would have still won with 47.¢d2! f2 48.£c8! f1=£ 49.£e6+ ¢h8 50.£f6+ ¢g8 51.£g6+ ¥g7 52.£e6+ ¢h8 53.£e8+ ¥f8 54.£xf8#)47...f2 48.¢c4
Andreas Hagen:"Yannick is such a sport. At this point he indicated, with a smile, I should find all the available Queens in the hall."
48...f1=£+ 49.¦d3 g2! 50.¢b5 g1=£
Now follows a general slaughter. 51.¤c4 £ff2 52.£b3 £b1 53.¢c6 £xb3 54.¦xb3 £c2 55.¦g3+ ¢h8 56.¢b5 £a1 57.¦a3
Hope springs eternal. White still wants to promote the a-pawn and shift the balance of power-CB
and White resigned in view of 58...£cxc3 59.¥xc3 £c5+ 60.¢a4 £xc4+ 61.¥b4 £xa6+