For the launch of the Pirc Powerbook 2025 a minimum rating of rating 2200 was set for computer games, 2000 for human games. 115 000 games from Mega and correspondence chess crossed this threshold, to which were added roughly 168 000 from the engine room of playchess.com, making a total of 283 000 games. The Pirc Defence is considered risky from Black’s point of view, because the centre is conceded to White. On the other hand, that creates for Black a chance, because just like, e.g., in the Grünfeld Defence he can attack the white centre. Thus the Pirc Defence is well suited to playing for a win with the black pieces.
The study of sub-variations with the help of the Powerbook is worth it. For example there is a little trick on offer in the variation with 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.h4!? Bg7
and then 5.f3!?; the idea is that after the immediate 4.f3 Black usually delays the development of the Bf8 and continues with 4...c6 followed by ...b5. But the Powerboook also shows a counter-trick: after 5.f3 c6 6.Be3 the move 6...h5 turns out to be statistically interesting.
In the Pirc Defence, we come up against a second opening in which Black does not start by moving a pawn to the fifth rank. Instead of that he plans, by means of ...d6, ...Nf6, the bishop fianchetto ...g6, ...Bg7 and ...0-0, to adopt a formation similar to one in the King’s Indian, one of the most popular openings against 1.d4. The Pirc or the Pirc-Ufimtsev Defence goes back to the 1940s, making it even more recent than the Alekhine Defence; it takes its name from the Yugoslavian master Vasja Pirc (1907–1980) and Soviet master from Kazakhstan Anatoly Ufimtsev (1914–2000).
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