Tigran V Petrosian - Ludek Pachman [A04]
King's Indian Attack
Bled (6) 1961
Petrosian's own system against the KIA involved 7... d6!
To control critical dark squares at f6 and 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!
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... b6!? seems risky because it opens the long diagonal, but Henley suggests this may have been best.
To prevent Ra5!
Position after 18...Rd8?
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