Tigran V Petrosian - Ludek Pachman [A04]

King's Indian Attack

Bled (6) 1961

1. Nf3 c5 2. g3 Nc6 3. Bg2 g6 4. O-O Bg7 5. d3 e6 6. e4 Nge7 7. Re1 O-O

Petrosian's own system against the KIA involved 7... d6!


8. e5!

To control critical dark squares at f6 and d6.


8... d6

P. H. Clarke writes of this move: "Correctly played. This must come sooner or later, and to put it off in favor of 8... b6!? or 8... Qc7 would alow White more time to prepare for it." Ron Henley notes that without this break in the center, Black would present White with a simple plan to control the dark squares by Nbd2, Nc4, Be3, Qd2, and Bh6 etc. Consider the following sample line that could easily arise if Black simply developed "naturally": 8... b6 9. Nbd2 Bb7 10. Nc4 Nf5 11. g4! Nh4 12. Nxh4 Qxh4 13. g5!


9. exd6 Qxd6

9... Nf5


10. Nbd2

White threatens 11.Ne4 Qd5 12.c4! and the Queen must either abandon the c-pawn or risk further attack after 12... Qf5 13.h3!


10... Qc7

10... b6!? seems risky because it opens the long diagonal, but Henley suggests this may have been best.


11. Nb3! Nd4?

11... b6 12. Bf4 Qd8 13. Ne5 Bb7 14. Nc4 and Black's pieces are well placed to fight off White's attack on the dark squares.


12. Bf4 Qb6

12... Nxf3+ 13. Qxf3 e5 14. Be3 +- (or 14. Bd2)


13. Ne5! Nxb3 14. Nc4!+-

An essential zwichenzug. White gets nothing out of 14. axb3 Nd5 15. Nc4 Qc6 /=


14... Qb5

or 14... Qd8 15. axb3 Nf5 16. Qd2! with the idea of Ra5 or Qa5 and tremendous pressure on the White queenside which should win at least a pawn for White.


15. axb3 a5

To prevent Ra5!


16. Bd6 Bf6

16... Re8 17. Bc7!


17. Qf3! Kg7

17... Nd5 18. Bxf8+-


18. Re4!?

White misses the killer move at this juncture: 18. Qxf6+!! Kxf6 19. Be5+ Kg5 20. Bg7!!+- e5 (20... Rg8 21. f4+ Kg4 22. Ne5+ Kh5 23. Bf3#) 21. Rxe5+


18... Rd8?

But Black returns the favor. Essential, though lost, was 18... g5[] 19. Re5!-> 18... Rg8? 19. Qxf6+ Kxf6 20. Be5+ Kg5 21. Nd6!->


Position after 18...Rd8?


19. Qxf6+! Kxf6 20. Be5+ Kg5 21. Bg7!

White will force mate, as there is no defense to h4+ followed by Bh3 or Bf3# A Brilliant performance by Petrosian that demonstrates the power of the KIA on the dark squares.



Game in PGN